Предмет: Геометрия, автор: Lalalaaaa456

Дан триугольник АВС с высотой ВD, yгл А=45°, АD=6, DC=3. Найдите S триугольника АВС

Ответы

Автор ответа: ludmilaksenija2005

1

Объяснение:

S=1/2×AC×BD

tg<A=BD/AD

BD=AD×tg45=6×1=6

AC=AD+DC=6+3=9

S=1/2×9×6=27(ед^2)

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