Предмет: Геометрия, автор: elionorr

СРОЧНО!!!СПАСИБО!

рівнобедреному трикутнику АВС (див. малюнок) зовнішній кут до кута C дорівнює 100 градусів. Знайдіть величину кута 2 .

Приложения:

zmeura1204: 80°

Ответы

Автор ответа: v0vchik2008tr

Відповідь:

80 градусів

Пояснення:

Дано:

зовнішний кут трикутника дорівнює 100 градусів,

також цей кут є частиною розгорнутого кута => що кут С=180гр-100гр=80гр

так як цей трикутник є рівнобедреним то кути у нього при основі рівні => кут С=куту А і =80.2 кут є вертикальним до кута А що означає що кут А= куту 2 і = 80 (як вертикальні кути)

сподіваюсь допоміг,бо якщо так то я радий))

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