Предмет: Геометрия, автор: 0972563147d

срочно зделать !!!!!!!!​

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Автор ответа: qq0o
1
сума внутрішніх односторонніх кутів при паралельних прямих 180°.
а) нехай кут 1=х, тоді кут 2=х+18
складаємо рівняння
х+18+х=180
2х=180-18
2х=162
х=162:2
х=81
отже перший кут=81°, а другий 81+18=99°
81+99=180
б) нехай кут 1=х, тоді кут2=2х
х+2х=180
3х=180
х=60
отже перший кут 60°, а другий 60*2=120°
120+60=180
в) нехай х-коефіцієнт пропорційності
тоді кут 1=2х, кут 2=4х
2х+4х=180
6х=180
х=30
отже перший кут = 30*2=60°, другий=30*4=120°
60+120=180

0972563147d: можеш відповісти
0972563147d: б)перший рядок тамде
0972563147d: 2xx
0972563147d: це 2 помножити на x
qq0o: да
qq0o: типо потому что один угол в два раза больше другого
qq0o: поэтому один угол х второй 2х
qq0o: и 2х+х
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