Предмет: Геометрия, автор: yfnxb28

Узнать AC -?
Заранее спасибо

Приложения:

Ответы

Автор ответа: binamaksimchuk

Ответ:

Объяснение:

AL- биссектриса <A,поэтому

<A=2×<LAC=2×15°=30°

BC= 1/2AB=1/2×20=10 см

По теореме Пифагора:

AC=√AB²-BC²=√20²-10²=√400-100=√300=10√3 см

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