Mathematics
Junior High
Resolved
(3)と(4)を教えてください。
(3)は出たんですが凄く時間かかったので簡単な方法を教えて欲しいです。
34°(
17°
66
30°
t64°%
20°/
m-
8
70°
8
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(180-●×2)+(180-○×2)+70=180
⇒ ●+○= (180+70)/2
x=180-(●+○)