3.44 Точка Е- середина боковой стороны СД трапеции АВСД. Площадь треугольника АВ...

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3.44
Точка Е- середина боковой стороны СД трапеции АВСД. Площадь треугольника АВЕ равна S. Найти площадь трапеции.

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$S_{ABCD} = S_{BEC} + S_{AED} + S\\\\
 BC=b\\
 AD=a\\
 h\\\\
S_{BEC} = \frac{\frac{h}{2}b}{2}=\frac{hb}{4} \\
S_{AED} = \frac{\frac{h}{2}a}{2}=\frac{ha}{4} \\
S_{ABCD} = \frac{S_{ABCD}}{2}+S\\\\
 S_{ABCD}=2S$

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Answers & Comments

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okolo okruzhnosti radiusa 6 sm opisan parallelogramm ploshad chetyryohugolnika s

vychislit ploshad trapecii s osnovaniyami 5sm i 9sm i ostrymi uglami pri bolshem

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cherez vershinu pryamogo ugla pryamougolnogo treugolnika s katetami 6 i 8 sm prove

reshite pozhalujsta najti ploshad parallelogramma esli ego bolshaya diagonal

diagonali ravnobokoj trapecii vzaimno perpendikulyarny najti ploshad trapecii e

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