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MakcuM [25]
3 years ago
10

Heeeeellllppp PLEASE!!!! 20 POINTS!!!

Mathematics
1 answer:
Scilla [17]3 years ago
3 0

The formula of a midpoint:

\left(\dfrac{x_1+x_2}{2};\ \dfrac{y_1+y_2}{2}\right)

D is midpoint of TR.

We have T(-2a, 0) and R(-2b, 2c). Substitute:

x=\dfrac{-2a+(-2b)}{2}=\dfrac{-2a-2b}{2}=\dfrac{2(-a-b)}{2}=-a-b\\\\y=\dfrac{0+2c}{2}=\dfrac{2C}{2}=c

<h3>Answer: b.  (-a - b, c)</h3>
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