Common Core: High School - Geometry : Congruence

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 #7 : Prove Triangle Theorems: Ccss.Math.Content.Hsg Co.C.10

Are the two triangles shown congruent?

Hsg.co.c.10 q9

Possible Answers:

No

Yes

Correct answer:

No

Explanation:

For two triangles to be congruent they must have equal corresponding angles and sides. There are five geometric theorems that can be used to prove whether triangles are congruent or not. Since, these two triangles have two defined angles and the side between the angles are defined as well, the Angle, Side, Angle geometric theorem can be used.

Hsg.co.c.10 q9

Looking at the triangles the corresponding angles are not equal therefore, the triangles are not congruent.

Example Question #8 : Prove Triangle Theorems: Ccss.Math.Content.Hsg Co.C.10

Are the two triangles shown congruent?

Hsg.co.c.10 q9

Possible Answers:

No

Yes

Correct answer:

No

Explanation:

For two triangles to be congruent they must have equal corresponding angles and sides. There are five geometric theorems that can be used to prove whether triangles are congruent or not. Since, these two triangles have two defined angles and the side between the angles are defined as well, the Angle, Side, Angle geometric theorem can be used.

 

Hsg.co.c.10 q9

Looking at the triangles the corresponding angles are not equal and the correspond side is also not equal therefore, the triangles are not congruent.

Example Question #9 : Prove Triangle Theorems: Ccss.Math.Content.Hsg Co.C.10

Are the two triangles congruent?

Hsg.co.c.10 q10

Possible Answers:

Yes

No

Correct answer:

No

Explanation:

For two triangles to be congruent they must have equal corresponding angles and sides. There are five geometric theorems that can be used to prove whether triangles are congruent or not. Since, these two triangles have all three sides defined, the Side, Side, Side geometric theorem can be used.

 

Hsg.co.c.10 q10

Looking at the triangles the corresponding sides are not equal therefore, the triangles are not congruent.

Example Question #1 : Prove Triangle Theorems: Ccss.Math.Content.Hsg Co.C.10

Are the two triangles congruent?

Screen shot 2016 07 19 at 8.03.31 amScreen shot 2016 07 19 at 8.03.25 am

Possible Answers:

No

Yes

Correct answer:

Yes

Explanation:

For two triangles to be congruent they must have equal corresponding angles and sides. There are five geometric theorems that can be used to prove whether triangles are congruent or not. Since, these two triangles have two defined angles and the side defined as well, the Angle, Angle, Side geometric theorem can be used.

Screen shot 2016 07 19 at 8.03.31 amScreen shot 2016 07 19 at 8.03.25 am

Looking at the triangles the corresponding angles are equal and the correspond side is also equal therefore, the triangles are congruent.

Example Question #91 : Congruence

Are the two triangles shown congruent?

Hsg.co.c.10 q6

Possible Answers:

No

Yes

Correct answer:

No

Explanation:

For two triangles to be congruent they must have equal corresponding angles and sides. There are five geometric theorems that can be used to prove whether triangles are congruent or not. Since, these two triangles have two defined angles and the side between the angles are defined as well, the Angle, Side, Angle geometric theorem can be used.

Hsg.co.c.10 q6

Looking at the triangles the corresponding angles are not equal therefore, the triangles are not congruent.

Example Question #92 : Congruence

Are these two triangles congruent?

Screen shot 2016 07 20 at 10.53.47 am

Possible Answers:

No

Yes

Correct answer:

Yes

Explanation:

For two triangles to be congruent, they must meet one of the five geometric theorems that prove triangles congruency. We can see that each triangle has a corresponding right angle, and each triangle has a corresponding hypotenuse of length 5. However, having one matching angle and one matching side is not enough to prove congruency.

Apply the Pythagorean Theorem, a2+b2=c2, to the first triangle, to yield A2+42=52, which simplifies to A2+16=25, which simplifies to A2=9. Solve for A by taking the square root of each side: . Therefore A = 3.

Because this is a right triangle, we can use the Hypotenuse Leg Theorem to prove congruency, since in the leftmost triangle, hypotenuse = 5 and a leg = 3, and in the rightmost triangle, the hypotenuse = 5 and a leg = 3.

 

 

 

 

Screen shot 2016 07 20 at 10.53.47 am

After using the Pythagorean Theorem to find the missing side of the leftmost triangle, these triangles are congruent based on the Hypotenuse Leg Theorem.

Example Question #1 : Prove Parallelogram Theorems: Ccss.Math.Content.Hsg Co.C.11

What is known if  is said to be a parallelogram?

Possible Answers:

Opposite side lengths are parallel.

 is a quadrilateral. 

All of the other answers are correct.

Correct answer:

All of the other answers are correct.

Explanation:

A parallelogram is a special type of quadrilateral meaning, it is a shape that has four sides with opposite sides being parallel.

Drawing the parallelogram  can be done as follows.

Parallelogram

Looking at the image it can be said that,

 and .

Therefore, all of the possible answer choices are correct.

Example Question #1 : Prove Parallelogram Theorems: Ccss.Math.Content.Hsg Co.C.11

Which of the following helps prove an image is a parallelogram?

Possible Answers:

One Set of Parallel Lines

Two Lines must be Perpendicular

Congruent Opposite Angles

None of the other answers.

Angles that Exceed 

Correct answer:

Congruent Opposite Angles

Explanation:

A parallelogram is a special type of quadrilateral meaning, it is a shape that has four sides with opposite sides being parallel. Along with opposite sides being congruent, a parallelogram has two pairs of opposite angles that are congruent. Lastly, the diagonals of a parallelogram must bisect each other.

Parallelogram

Example Question #2 : Prove Parallelogram Theorems: Ccss.Math.Content.Hsg Co.C.11

Which of the following helps prove an image is a parallelogram?

Possible Answers:

Two Lines must be Perpendicular

None of the other answers

One Set of Parallel Lines

Bisecting Diagonals 

Angles that Exceed 

Correct answer:

Bisecting Diagonals 

Explanation:

A parallelogram is a special type of quadrilateral meaning, it is a shape that has four sides with opposite sides being parallel. Along with opposite sides being congruent, a parallelogram has two pairs of opposite angles that are congruent. Lastly, the diagonals of a parallelogram must bisect each other.

Parallelogram

Example Question #3 : Prove Parallelogram Theorems: Ccss.Math.Content.Hsg Co.C.11

Which of the following helps prove an image is a parallelogram?

Possible Answers:

Two Lines must be Perpendicular

Two Sets of Opposite Parallel Lines

Angles that Exceed 

One Set of Parallel Lines

All of the answers are correct

Correct answer:

Two Sets of Opposite Parallel Lines

Explanation:

A parallelogram is a special type of quadrilateral meaning, it is a shape that has four sides with opposite sides being parallel. Along with opposite sides being congruent, a parallelogram has two pairs of opposite angles that are congruent. Lastly, the diagonals of a parallelogram must bisect each other.

Parallelogram

All Common Core: High School - Geometry Resources

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