Common Core: High School - Geometry : Angle, Circle, Perpendicular and Parallel Lines, and Line Segment Definitions: CCSS.Math.Content.HSG-CO.A.1

Study concepts, example questions & explanations for Common Core: High School - Geometry

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All Common Core: High School - Geometry Resources

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Example Questions

Example Question #1 : Congruence

A truck is traveling down a hill, which of the following statements is/are true?

Possible Answers:

The body of the truck is parallel to the hill.

The body of the truck is not perpendicular to the hill.

The body of the truck is perpendicular to the hill.

The truck tires are parallel to the hill.

None of the other answers.

Correct answer:

The body of the truck is not perpendicular to the hill.

Explanation:

This question is trying to put a mathematical definition to a real life situation. First, recall the definitions of parallel and perpendicular lines, since those terms are among the answer selections. 

Parallel lines: In a plane, parallel lines are lines that will never intersect. This means they have the same slope but different intercepts.

Perpendicular lines: In a plane, perpendicular lines are lines that intersect by creating a \(\displaystyle 90^\circ\) degree angle. This also means they have opposite sign, reciprocal slopes.

Now, look at the aspects of this particular problem.

"A truck is traveling down a hill"

From this statement, it cannot be assumed that the hill is a straight line nor can it be assumed that the hill goes on forever. Therefore, the truck and the hill will never be parallel. Also, for these same reasons it is known that the truck will never be perpendicular to the hill. The relation of the truck's tires to the hill will never be parallel since they constantly touch.

Thus, the correct answer choice is,

"The body of the truck is not perpendicular to the hill." 

Example Question #2 : Angle, Circle, Perpendicular And Parallel Lines, And Line Segment Definitions: Ccss.Math.Content.Hsg Co.A.1

A truck is traveling up a hill, which of the following statements is/are true?

Possible Answers:

None of the other answers.

The body of the truck is not perpendicular to the hill.

The body of the truck is parallel to the hill.

The body of the truck is perpendicular to the hill.

The truck tires are parallel to the hill.

Correct answer:

The body of the truck is not perpendicular to the hill.

Explanation:

This question is trying to put a mathematical definition to a real life situation. First, recall the definitions of parallel and perpendicular lines, since those terms are among the answer selections. 

Parallel lines: In a plane, parallel lines are lines that will never intersect. This means they have the same slope but different intercepts.

Perpendicular lines: In a plane, perpendicular lines are lines that intersect by creating a \(\displaystyle 90^\circ\) degree angle. This also means they have opposite sign, reciprocal slopes.

Now, look at the aspects of this particular problem.

"A truck is traveling up a hill"

From this statement, it cannot be assumed that the hill is a straight line nor can it be assumed that the hill goes on forever. Therefore, the truck and the hill will never be parallel. Also, for these same reasons it is known that the truck will never be perpendicular to the hill. The relation of the truck's tires to the hill will never be parallel since they constantly touch.

Thus, the correct answer choice is,

"The body of the truck is not perpendicular to the hill." 

Example Question #1 : Angle, Circle, Perpendicular And Parallel Lines, And Line Segment Definitions: Ccss.Math.Content.Hsg Co.A.1

There exists four points on a certain line A. Which of the following is true?

Possible Answers:

The points are collinear

The points are perpendicular

The points are equidistant

The points are parallel

None of the other answers

Correct answer:

The points are collinear

Explanation:

First, recall the definitions of the terms in the possible answer choices.

Collinear: Represents points that all fall on the same line.

Equidistance: Represents points that are the same length away from one another.

Parallel: In a plane, parallel lines are lines that will never intersect. This means they have the same slope but different intercepts.

Perpendicular: In a plane, perpendicular lines are lines that intersect by creating a \(\displaystyle 90^\circ\) degree angle. This also means they have opposite sign, reciprocal slopes.

Therefore, the correct answer is collinear.

Example Question #3 : High School: Geometry

The seat of a swing on a swing set is attached to the top horizontal bar by two chains that are exactly \(\displaystyle 24\) inches from each other and of equal length. The seat of the swing is also \(\displaystyle 24\) inches. Which of the following statements describes the geometric relationship between one of the chains and the horizontal bar it is attached to?

Possible Answers:

Neither

Parallel

Perpendicular

Correct answer:

Perpendicular

Explanation:

This question is trying to put a mathematical definition to a real life situation. First, recall the definitions of parallel and perpendicular lines, since those terms are among the answer selections. 

Parallel lines: In a plane, parallel lines are lines that will never intersect. This means they have the same slope but different intercepts.

Perpendicular lines: In a plane, perpendicular lines are lines that intersect by creating a \(\displaystyle 90^\circ\) angle. This also means they have opposite sign, reciprocal slopes.

Now, look at the aspects of this particular problem.

"The seat of a swing on a swing set is attached to the top horizontal bar by two chains that are exactly \(\displaystyle 24\) inches from each other and of equal length. The seat of the swing is also \(\displaystyle 24\) inches."

The question is asking to define the relationship between one of the chains and the horizontal bar it is attached to. Since the swing will hang directly down from the two chains and the bar is horizontal to ground it can be assumed that the chain and the bar form a \(\displaystyle 90^\circ\) angle and thus, they are perpendicular to one another.

Example Question #2 : Congruence

The seat of a swing on a swing set is attached to the top horizontal bar by two chains that are exactly \(\displaystyle 24\) inches from each other and of equal length. The seat of the swing is also \(\displaystyle 24\) inches. Which of the following statements describes the geometric relationship between the two chains?

Possible Answers:

Parallel

Neither

Perpendicular

Correct answer:

Parallel

Explanation:

This question is trying to put a mathematical definition to a real life situation. First, recall the definitions of parallel and perpendicular lines, since those terms are among the answer selections. 

Parallel lines: In a plane, parallel lines are lines that will never intersect. This means they have the same slope but different intercepts.

Perpendicular lines: In a plane, perpendicular lines are lines that intersect by creating a \(\displaystyle 90^\circ\) angle. This also means they have opposite sign, reciprocal slopes.

Now, look at the aspects of this particular problem.

"The seat of a swing on a swing set is attached to the top horizontal bar by two chains that are exactly \(\displaystyle 24\) inches from each other and of equal length. The seat of the swing is also \(\displaystyle 24\) inches."

The question is asking to define the relationship between the two chains that hold the swing to the swing set. Since the two chains are exactly \(\displaystyle 24\) inches apart from one another and attached to the pole which is horizontal from the swing and the swing seat itself is \(\displaystyle 24\) inches, it is concluded that the two chains are parallel to one another.

Example Question #3 : Congruence

The seat of a swing on a swing set is attached to the top horizontal bar by two chains that are exactly \(\displaystyle 24\) inches from each other and of equal length. The seat of the swing is also \(\displaystyle 24\) inches. Which of the following statements describes the geometric relationship between the horizontal bar and the swing?

Possible Answers:

Parallel

Perpendicular

Neither

Correct answer:

Parallel

Explanation:

This question is trying to put a mathematical definition to a real life situation. First, recall the definitions of parallel and perpendicular lines, since those terms are among the answer selections. 

Parallel lines: In a plane, parallel lines are lines that will never intersect. This means they have the same slope but different intercepts.

Perpendicular lines: In a plane, perpendicular lines are lines that intersect by creating a \(\displaystyle 90^\circ\) angle. This also means they have opposite sign, reciprocal slopes.

Now, look at the aspects of this particular problem.

"The seat of a swing on a swing set is attached to the top horizontal bar by two chains that are exactly \(\displaystyle 24\) inches from each other and of equal length. The seat of the swing is also \(\displaystyle 24\) inches."

The question is asking to define the relationship between the horizontal bar and the swing seat. Since the two chains are exactly \(\displaystyle 24\) inches apart from one another and of equal length and attached to the pole which is horizontal from the swing and the swing seat itself is \(\displaystyle 24\) inches, it is concluded that the seat and the horizontal bar are parallel to one another.

Example Question #4 : Congruence

A circular pizza is cut into \(\displaystyle 8\) equal slices. Which of the following is an accurate mathematical description of one of the pizza slices?

Possible Answers:

The central angle of one pizza slice is \(\displaystyle 360\) degrees.

The central angle of one pizza slice is \(\displaystyle 90\) degrees.

None of the answers.

The central angle of one pizza slice is \(\displaystyle 45\) degrees.

The central angle of one pizza slice is \(\displaystyle 40\) degrees.

Correct answer:

The central angle of one pizza slice is \(\displaystyle 45\) degrees.

Explanation:

This question is trying to put a mathematical definition to a real life situation. First, recall the definitions of circles and corresponding angles. 

A central angle is known as the angle of a circle where the vertex of the angle is located at the center of the circle. 

A circle is composed of 360 degrees.

Knowing these characteristics, solve for the central angle of one slice of pizza.

\(\displaystyle \\360^\circ=8\cdot \text{slice} \\\\\frac{360^\circ}{8}=\text{silce} \\\\45^\circ=\text{slice}\)

Therefore, the correct answer is

"The central angle of one pizza slice is \(\displaystyle 45\) degrees."

Example Question #8 : Angle, Circle, Perpendicular And Parallel Lines, And Line Segment Definitions: Ccss.Math.Content.Hsg Co.A.1

A circular pizza that has a radius of \(\displaystyle 6\) inches and is cut into \(\displaystyle 8\) equal slices. Which of the following is an accurate mathematical description of one of the pizza slices?

Possible Answers:

\(\displaystyle \textup{The arc length of one slice of pizza is }\frac{3}{2}\textup{ inches.}\)

\(\displaystyle \textup{The arc length of one slice of pizza is }3\textup{ inches.}\)

 \(\displaystyle \textup{The arc length of one slice of pizza is }\frac{3}{2}\pi\textup{ inches.}\) 

\(\displaystyle \textup{The arc length of one slice of pizza is }\frac{2}{3}\pi\textup{ inches.}\)

\(\displaystyle \textup{The arc length of one slice of pizza is }{3}\pi\textup{ inches.}\)

Correct answer:

 \(\displaystyle \textup{The arc length of one slice of pizza is }\frac{3}{2}\pi\textup{ inches.}\) 

Explanation:

This question is trying to put a mathematical definition to a real life situation. First, recall the definitions of circles and corresponding angles. 

A central angle is known as the angle of a circle where the vertex of the angle is located at the center of the circle. 

A circle is composed of 360 degrees.

The circumference of a circle is the length around the circle and the radius is the length from the center of the circle to any point on the circle's edge.

For this particular question, calculate the circumference and then calculate the arc length of each slice pizza slice.

\(\displaystyle \\C=2 \pi \codt r \\C=2\cdot 6\pi \\C=12\pi\)

Since there are 8 equal slices, divide the circumference by 8.

\(\displaystyle C=\frac{12\pi}{8}=\frac{3\cdot 4\pi}{2\cdot 4}=\frac{3\pi}{2}\)

Therefore, the correct answer is

"The arc length of one slice of pizza is \(\displaystyle \frac{3}{2}\pi\) inches."

Example Question #2 : Congruence

Screen shot 2016 06 08 at 12.39.14 pm

Looking at the given clock where the radius is \(\displaystyle 4\) inches, which of the following statements accurately describes the space between the hour and minute hand?

Possible Answers:

The area between the hour and minute hand is \(\displaystyle \frac{192\pi}{5}\)

The area between the hour and minute hand is \(\displaystyle \frac{80\pi}{12}\)

The area between the hour and minute hand is \(\displaystyle \frac{12\pi}{80}\)

None of the answers.

The area between the hour and minute hand is \(\displaystyle \frac{38\pi}{2}\)

Correct answer:

The area between the hour and minute hand is \(\displaystyle \frac{80\pi}{12}\)

Explanation:

This question is trying to put a mathematical definition to a real life situation. First, recall the definitions of circles and corresponding angles. 

A central angle is known as the angle of a circle where the vertex of the angle is located at the center of the circle. 

A circle is composed of 360 degrees.

The area of a circle is found by using the formula \(\displaystyle A=\pi r^2\).

Screen shot 2016 06 08 at 12.39.14 pm

For this particular problem first calculate the area of the clock.

\(\displaystyle \\A=\pi r^2 \\A=\pi(4^2) \\A=16\pi\)

Now, since the clock reads 4:50, the distance between the hour and minute hands is \(\displaystyle \frac{5}{12}\) of the total clock. From here, calculate the area between the two hands.

\(\displaystyle \\{16\pi}\times\frac{5}{12} \\\\\frac{80\pi }{12}\)

Therefore, the correct answer is

The area between the hour and minute hand is \(\displaystyle \frac{80\pi}{12}\).

Example Question #10 : Angle, Circle, Perpendicular And Parallel Lines, And Line Segment Definitions: Ccss.Math.Content.Hsg Co.A.1

Screen shot 2016 06 08 at 12.39.37 pm

Looking at the given clock where the radius is \(\displaystyle 4\) inches, which of the following statements accurately describes the space between the hour and minute hand (Going clockwise)? 

Possible Answers:

The angle between the hour and minute hand is greater than \(\displaystyle 180\) degrees.

None of the answers.

The angle between the hour and minute hand is greater than \(\displaystyle 270\) degrees.

The angle between the hour and minute hand is less than \(\displaystyle 180\) degrees.

The angle between the hour and minute hand is less than \(\displaystyle 150\) degrees.

Correct answer:

The angle between the hour and minute hand is greater than \(\displaystyle 180\) degrees.

Explanation:

This question is trying to put a mathematical definition to a real life situation. First, recall the definitions of circles and corresponding angles. 

A central angle is known as the angle of a circle where the vertex of the angle is located at the center of the circle. 

A circle is composed of 360 degrees.

Also recall that a straight line measures 180 degrees.

Looking at the given clock, it is seen that a straight line can be created by connecting the 12 and 6 on the clock. Since the clock reads 11:35 the angle between the hour and minute hand is greater than 180 degrees because the hour hand is behind the 12 and the minute hand is behind the 6 on the clock.


Screen shot 2016 06 08 at 12.39.37 pm

All Common Core: High School - Geometry Resources

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