E. 20
Penjelasan dengan langkah-langkah:
6x + 2x + 20 = 180° (berpelurus)
8x + 20 = 180°
8x = 180 - 20
8x = 160°
x = 160 ÷ 8
x =
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E. 20
Penjelasan dengan langkah-langkah:
6x + 2x + 20 = 180° (berpelurus)
8x + 20 = 180°
8x = 180 - 20
8x = 160°
x = 160 ÷ 8
x =