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Автор - Дима Круглов и Захар Ковин

Дан треугольник ABC.
Дан треугольник ABC.

AC= 19,8 см;

∢ B= 60°;
∢ C= 45°.

Ответ: AB=
−−−−−√ см.
Предыдущее задание

Ответ

Автор - з ина
Из A проведи высоту-h
По теореме Пифагора h^2=(19.8^2)/2; h=19.8/√2
sin60=(√3)/2 =h/AB; AB=(2h)/√3=(2*(19.8/√2))/√3=39.6/√6

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