Предмет: Геометрия, автор: wowa9964

В треугольнике ABC ∠А = 70°, ∠C = 55°.

а) Докажите что треугольник АВС - равнобедренный, и укажите его основание

б) Отрезок ВМ - высота данного тругольника. Найдите углы, на которой она делит АВС

С решением и с треугольником

Ответы

Автор ответа: nat59gut81

2

Ответ:

Объяснение: а)сумма углов Δ =180→ ∠В=180-70-55=55

треугольник АВС - равнобедренный,так как углы при основании ВС равны

б) в прямоуг.Δ МАВ ∠А=70→ ∠В=20

так как ∠АВС=55, то высота делит ∠АВС на углы 20 и 35

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