High School Math : Coordinate Geometry

Study concepts, example questions & explanations for High School Math

varsity tutors app store varsity tutors android store

Example Questions

Example Question #4 : How To Find The Length Of A Line With Distance Formula

What is the length of a line with endpoints at  and ?

Possible Answers:

Correct answer:

Explanation:

The formula for the length of a line is very similiar to the pythagorean theorem:

Plug in our given numbers to solve:

Example Question #21 : Coordinate Geometry

Find the distance between points  and .

Possible Answers:

Correct answer:

Explanation:

Use the distance formula:

Substitute the given points into the formula:

Example Question #7 : How To Find The Length Of A Line With Distance Formula

What is the length of a line with endpoints of and ?

Possible Answers:

Correct answer:

Explanation:

The distance formula is just a reworking of the Pythagorean theorem:

Expand that.

Plug in our given values.

Example Question #1366 : High School Math

What is the distance between and ?

Possible Answers:

Correct answer:

Explanation:

Let and .

The distance formula is given by .

Substitute in the given points:

Example Question #23 : Algebra I

A line segment has endpoints at  and . What is the distance of this segment?

Possible Answers:

Correct answer:

Explanation:

To find the distance, we use the distance formula: .

Expand that:

Plug in our given values.

Example Question #5 : How To Find The Length Of A Line With Distance Formula

If a line has a length of , and the endpoints are  and , what is the value of ?

Possible Answers:

Correct answer:

Explanation:

The formula for the length of a line, l, is the distance formula, which is very similar to the Pythagorean Theorem.

Note that the problem has already given us a value for the length of the line. That means . Plug in all of the given values and solve for the missing term.

Subtract  from both sides.

Example Question #22 : Coordinate Geometry

What is the distance between points  and ?

Possible Answers:

Correct answer:

Explanation:

Use the distance formula:

Plug in the given points:

Example Question #1 : Perpendicular Lines

Write an equation in slope-intercept form for the line that passes through and that is perpendicular to a line which passes through the two points and .

Possible Answers:

Correct answer:

Explanation:

Find the slope of the line through the two points. It is .

Since the slope of a perpendicular line is the negative reciprocal of the original line, the new line's slope is . Plug the slope and one of the points into the point-slope formula  . Isolate for

 

Example Question #2 : Perpendicular Lines

Find the equation of a line perpendicular to 

Possible Answers:

Correct answer:

Explanation:

Since a perpendicular line has a slope that is the negative reciprocal of the original line, the new slope is . There is only one answer with the correct slope.

Example Question #3 : Perpendicular Lines

Find the equation (in slope-intercept form) of a line perpendicular to 

Possible Answers:

Correct answer:

Explanation:

First, find the slope of the original line, which is . You can do this by isolating for  so that the equation is in slope-intercept form. Once you find the slope, just replace the  in the original equation withe the negative reciprocal (perpendicular lines have a negative reciprocal slope for each other). Thus, your answer is 

Learning Tools by Varsity Tutors