Предмет: Алгебра, автор: zyablov1406

в прямоугольнике одна сторона равна 72, а диагональ 78.
найдите площадь треугольника

bena20193: площадь прямоугольника

Ответы

Автор ответа: bena20193
3

Ответ:

Объяснение:

пусть другая сторона равна a

стороны прямоугольника и диагональ образуют прямоугольный треугольник

По теореме Пифагора

a²+72²=78²

a²=78²-72²=(78-72)(78+72)=6*150=900

a=√900=30

S=ab=30*72=2160 квадратных единиц

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