1. Основание равнобедренного треугольника равно 8 см, боковая сторона-4 корня из 5 см. Вычислите площадь данного треугольника. 2. Основания равнобокой трапеции равны 4 см и 12 см, а диагональ делит её тупой угол пополам. Найдите площадь трапеции. 3. В треугольнике ABC известно, что угол A=90 градусам, AC=3 см, BC=15 см. Чему равен косинус (cos) C?

1. Основание равнобедренного треугольника равно 8 см, боковая сторона-4 корня из 5 см. Вычислите площадь данного треугольника.

2. Основания равнобокой трапеции равны 4 см и 12 см, а диагональ делит её тупой угол пополам. Найдите площадь трапеции.

3. В треугольнике ABC известно, что угол A=90 градусам, AC=3 см, BC=15 см. Чему равен косинус (cos) C?
- Предмет:
  Геометрия
- Автор:
  julien
- 5 лет назад

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- Автор:
  dillanl13k
- 5 лет назад
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