Дано угол 1=60 градусов,угол 2=20 градусов,а||b найти угол3

Дано угол 1=60 градусов,угол 2=20 градусов,а||b найти угол3
- Предмет:
  Геометрия
- Автор:
  sherman
- 5 лет назад

Ответы 1

Ответ: 80°
Объяснение:
Через точку С проведем прямую m, параллельную прямым а и b.
Она разобьет угол 3 на два угла.
∠3 = ∠4 + ∠5
∠4 = ∠1 = 60° как накрест лежащие при пересечении параллельных прямых а и m секущей АС,
∠5 = ∠2 = 20° как накрест лежащие при пересечении параллельных прямых b и m секущей BС.
∠3 = 60° + 20° = 80°
- Автор:
  rileyxcbb
- 5 лет назад
- 0
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Дано угол 1=60 градусов,угол 2=20 градусов,а||b найти угол3

Ответы 1

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