Mathematics · Grades 8–10
Midpoint coordinates
Average the x-coordinates separately from the y-coordinates.
The key idea
Average the x-coordinates separately from the y-coordinates.
M = ((x₁ + x₂)/2, (y₁ + y₂)/2)
Worked examples
Find only the x-coordinate of the midpoint of (19, -12) and (-12, 11).
(19 + (-12))/2 = 3.5
3.5
Find only the x-coordinate of the midpoint of (8, -16) and (-23, 13).
(8 + (-23))/2 = -7.5
-7.5
Try it yourself
Find only the x-coordinate of the midpoint of (21, -9) and (-20, -1).
Find only the x-coordinate of the midpoint of (-8, -18) and (6, 19).
Check your understanding
Answers and marking notes
- 0.5
(21 + (-20))/2 = 0.5
- -1
(-8 + (6))/2 = -1
Further reading and review references
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Learning preview · teacher review required. Grade bands are approximate, not official curriculum alignment.