Предмет: Алгебра, автор: крассссотка2

помогите да, ничего не понятно.
найдите острые углы треугольника.

Приложения:

Ответы

Автор ответа: karolinamyr28
1
В=30°
А=60°
Сумма острых углов в прямоугольном треугольнике равна 90°)
Автор ответа: andreevnaelina
1
Дано: треугольник АВС;
СD-высота;
<(угол)АСВ=90°;
<DCB=50°

Найти: <треугольника АВС

Решение: <DCA=90-50=40°;
Так как СD-высота, <CDA=CDB=90°;
Сумма углов в любом треугольнике равна 180°;
треугольник СDA: <АСD=40°,<CDA=90°, <DAC=180-(90+40)=180-130=50°
треугольник АВС: <АСВ=90°,<САВ=50°, <СВА=180-(90+50)=180-140=40°

Ответ: <CAB=50°, <CBA=40°
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