Предмет: Геометрия, автор: harlovaanastasia13

ПОМОГИТЕ ПОЖАЛУСТА
мне срочно надо​

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Ответы

Автор ответа: dobra888
0

Ответ:   С )  20° .

Объяснение:

ABCD - ромб ,  BD -  його діагональ , тому вона - бісектриса ∠ ADC .

∠ ADC = 2*∠BDC = 2 * 80° = 160° .

∠ A i ∠ ADC -  прилеглі кути до однієї сторони ромба ( паралелограма ),

тому  ∠ А = 180° - 160° = 20° .

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Where and when was Isaak Newton born?
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ISAAK NEWTON

The great English scientist Isaak Newton was bom in the village of Woolthorpe, not far from the university town of Cambridge on December 25, 1642. Little Isaak was left to the care of his mother, grandmother and uncle who sent him to school. In his early years young Isaak showed more as one who could make things with his hand then a scholar. He made various things. He made a clock that worked by water. He also made a sun-dial. When Isaak grew older, he took a con-sider¬able interest in mathematics. His ability as mathematician and physicist was very important. His first physical experiment was carried out when he was sixteen years old.
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