Question

Tolong banget bantu menjawab No 20

Answer 1

90 = <AOB + < BOC
90 = x + 3x + 10
90 = 4x + 10
90-10 = 4x
80 = 4x
80 : 4 = x
20 = x

maka <AOB = x = 20 derajat ========>D

Answer 2

90° = x°+(3x+10)°
90° = 4x°+10°
90°-10° = 4x°
80° = 4x°
20° = x

Sudut AOB = x°
= 20°

Semoga membantu..