Предмет: Геометрия, автор: varauruscaya

По данним рисунку 9 знайдіть кути паралелограма ABCD

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Ответы

Автор ответа: slganiev
0

Ответ:

∠В=117°, ∠Д=117°, ∠А=63°,∠С=63°

Объяснение:

Все елементарно і зрозуміло: ∠В=27°+90°=117°  ∠Д=∠В=117°, а ∑∠АіС=360-117-117=126 , тоді ∠А і∠С=126/2=63

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