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# What is the midpoint of 12,12 and 2,12?

I just need to understand how its done. I don't understand the midpoint formula.

### 6 Answers by Expert Tutors

Anna K. | Biological Sciences and Basic MathematicsBiological Sciences and Basic Mathematic...
4.9 4.9 (17 lesson ratings) (17)
3

The midpoint formula is: [(x1 + x2)/2 , (y1 + y2)/2)]

A data point is always given in the form of (x, y). In your question, 12, 12 would be the data point at x = 12 and y = 12 as well as x = 2 and y = 12. These are 2 different points on a graph.

To solve your equation by using the midpoint formula, you must take each x from the data points given to you (12 and 2) and add them together. After adding them together, divide that number by 2. Then, take your y data points of 12 and 12, add them together, and divide that number by 2. This will give you the midpoint of your 2 data points on a graph.

Kevin C. | Successful Math Tutor -- Recently retired high school math teacherSuccessful Math Tutor -- Recently retire...
5.0 5.0 (545 lesson ratings) (545)
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You could also think of what the midpoint really is,instead of memorizing formulas.  What you are doing is finding the average of the x and y values.

Gene G. | You can do it! I'll show you how.You can do it! I'll show you how.
5.0 5.0 (255 lesson ratings) (255)
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The short answer is that the midpoint formula simply calculates the point that is halfway between the start and end points along the x-axis, and the halfway point along the y-axis.  Those two midpoints are just the averages of the two x's and the two y's.

xmid = (x1 + x2)/2

ymid = (y1 + y2)/2

Nataliya D. | Patient and effective tutor for your most difficult subject.Patient and effective tutor for your mos...
2

x1 + x2      y1 + y2
( ———— , ————  )
2              2

(12, 12)     (2 , 12
↑    ↑        ↑     ↑
(x1 , y1)     (x2 , y2)

12 + 2      12 + 12
( ———— , ————— )
2               2

(7 , 12)   are coordinates of midpoint

Bill P. | A math tutor that is both knowledgeable and patient in secondary math.A math tutor that is both knowledgeable ...
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The average of 2 and 12 is 7. The average of 12 and 12 is 12. The mid-point is (7,12)

Chris B. | Mr. B.'s Tutoring - All things are possible if you don't give up.Mr. B.'s Tutoring - All things are possi...
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The midpoint formula helps you find the point in the middle of two points. Midpoint is short for middle point. Since your points are identified by two coordinates (x,y), you have to find the middle coordinates for x and y. The calculations work like averages, because there are two numbers. So the middle number between two numbers is the average of those two numbers. In your example the middle x-coordinate between 12 and 2 is the average of 12 and 2. (12+2)/2=7 So 7 is the middle x-coordinate between 12 and 2, because 7 is 5 away from 2 and 5 away from 12. The midpoint (middle number) of the y-coordinate is the average of the y-coordinates. (12+12)/2=12 Since there is no other number between 12 and 12, 12 is considered the y-coordinate of the midpoint. Finally, writing the coordinates as an ordered pair (x,y), you have the midpoint (7,12).

Plus if you graph these points and draw a horizontal line segment to connect them, you will see that the midpoint (7,12) is in the middle of the other two points (12,12) and (2,12). Notice that the y-coordinates are the same in your example. When each coordinate has a different value, you can draw right triangles to find the midpoint. Here's a video to how to find the midpoint using the midpoint formula.