Moneyman587
17.04.2020 •
Mathematics
Can you help me find the answer?
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Ответ:
using
[(n-2)180]÷n = 60
(n-2)180 = 60n
180n -360 = 60n
180n -60n =360
120n = 360
n = 360÷120 = 3
it's a triangle