Предмет: Геометрия, автор: bratishkaflypa

1. Точка Е- середина отрезка CD .Найдите координаты точки D,если C(-11;-9) и E(-8;3)
дам 100 баллов
8 класс

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Ответы

Автор ответа: zmeura1204

1

Ответ:

D(-5;15)

Объяснение:

D=2*E-C;

Xd=2*Xe-Xc=2*(-8)-(-11)=

=-16+11=-5

Yd=2*Ye-Yc=2*3-(-9)=

=6+9=15

D(-5;15)

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