Midpoint Formula - GRE Quantitative Reasoning

Card 0 of 7

Question

There is a line defined by two end-points, and . The midpoint between these two points is . What is the value of the point ?

Answer

Recall that to find the midpoint of two points and , you use the equation:

.

(It is just like finding the average of the two points, really.)

So, for our equation, we know the following:

You merely need to solve each coordinate for its respective value.

Then, for the y-coordinate:

Therefore, our other point is:

Compare your answer with the correct one above

Question

There is a line defined by two end-points, and . The midpoint between these two points is . What is the value of the point ?

Answer

Recall that to find the midpoint of two points and , you use the equation:

.

(It is just like finding the average of the two points, really.)

So, for our equation, we know the following:

You merely need to solve each coordinate for its respective value.

Then, for the y-coordinate:

Therefore, our other point is:

Compare your answer with the correct one above

Question

What is the other endpoint of a line segment with one point that is and a midpoint of ?

Answer

Recall that the midpoint formula is like finding the average of the and values for two points. For two points and , it is:

For our points, we are looking for . We know:

We can solve for each of these coordinates separately:

X-Coordinate

Y-Coordinate:

Therefore, our point is

Compare your answer with the correct one above

Question

What is the other endpoint of a line segment with one point that is and a midpoint of ?

Answer

What is the other endpoint of a line segment with one point that is and a midpoint of ?

Recall that the midpoint formula is like finding the average of the and values for two points. For two points and , it is:

For our points, we are looking for . We know:

We can solve for each of these coordinates separately:

X-Coordinate

Y-Coordinate:

Therefore, our point is

Compare your answer with the correct one above

Question

What is the midpoint of (2, 5) and (14, 18)?

Answer

The midpoint between two given points is found by solving for the average of each of the correlative coordinates of the given points. That is:

Midpoint = ( (2 + 14)/2 , (18 + 5)/2) = (16/2, 23/2) = (8, 11.5)

Compare your answer with the correct one above

Question

What is the midpoint between the points (1,3,7) and (–3,1,3)?

Answer

To find the midpoint, we add up the corresponding coordinates and divide by 2.

\[1 + –3\] / 2 = –1

\[3 + 1\] / 2 = 2

\[7 + 3\] / 2 = 5

Then the midpoint is (–1,2,5).

Compare your answer with the correct one above

Question

A line which cuts another line segment into two equal parts is called a ___________.

Answer

This is the definition of a bisector.

A midpoint is the point on a line that divides it into two equal parts. The bisector cuts the line at the midpoint, but the midpoint is not a line.

A transversal is a line that cuts across two or more lines that are usually parallel.

Parallel line and horizontal line don't make sense as answer choices here. The answer is bisector.

Compare your answer with the correct one above

Tap the card to reveal the answer