Предмет: Математика, автор: даша13100

найдите площадь треугольника ABC с вершинами а) A(2;3) B(2;-6) C(-3;-1)

Ответы

Автор ответа: Angelysek

0

s=1/2*[(x1-x3)(y2-y3)-(x2-x3)(y1-y3)]

x1=3 x2=5 x3=-3
y1=4 y2=-3 y3=-2

s=1/2[-6*1-8*6]=3*9=27 знак минус опущен, так как ответ берется по абсолютному значению полученному по формуле.

ответ а) 27

Вот все!

Автор ответа: даша13100

0

еще с 1 поможешь?

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