B. 70°
Penjelasan dengan langkah-langkah:
x + (3x +10)° = 90° (berpenyiku)
4x + 10° = 90°
4x = 90 - 10
4x = 80°
x =
x = 20°
<AOB = 3x + 10°
<AOB = 3(20) + 10
<AOB = 60 + 10
<AOB =
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B. 70°
Penjelasan dengan langkah-langkah:
x + (3x +10)° = 90° (berpenyiku)
4x + 10° = 90°
4x = 90 - 10
4x = 80°
x =
x = 20°
<AOB = 3x + 10°
<AOB = 3(20) + 10
<AOB = 60 + 10
<AOB =