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5 votes
5 votes
Endpoint 19,-10) Midpoint (4,8).What is the other endpoint

User Shiho
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1 Answer

16 votes
16 votes

Let the first end point be x1 y1 and the second x2 y2 the midpoint would be

x1 + x2 / 2 y1 + y2 / 2

Hence

(19 + x2)/2 = 4

19 + x2 = 8

x2 = 8 -19

x2 = -11

(-10 + y2)/2 =8

- 10 + y2 = 8

y2 = 8 + 10

= 18

The other end point is (-11, 18)

User Alex Arvanitidis
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2.9k points