Предмет: Геометрия, автор: sofa55558

найти площадь равнобедренного треугольника, если его основание 10см, а боковая сторона 13см.

Ответы

Автор ответа: ahta

0

h²=13²-5²=169-25=144
h=√144=12 cm
S=0.5×10×12=5×12=60 cm²

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