Mohon dibantu ya,Terimakasih

Garis dan Sudut

No.1
<AOC + <BOC = 180°
5a + 60 + 3a = 180
8a = 180 - 60
8a = 120
a = 120/8 = 15°

<AOC = 5a + 60
= 5 x 15 + 60
= 75 + 60
= 135°

No.2
<PLN + <MLN = 90°
6a + 3a = 90
9a = 90
a = 90/9 = 10°

Penyiku <PLN = <MLN
= 3a
= 3 x 10 = 30°

Penyiku <MLN = <PLN
= 6a
= 6 x 10 = 60°

No.3
<AEB + <BEC + <CED + AED = 360°
90 + 46 + 6y + 8y = 360
136 + 14y = 360
14y = 360 - 136
14y = 224
y = 224/14 = 16°

<AED = 8y
= 8 x 16
= 128°

No.4
<POS + <SOR + <QOR = 180°
2X - 9 + 4X + 3X - 15 = 180
9X - 24 = 180
9X = 180 + 24
9X = 204
X = 204/9
X = 22,67°

*semoga membantu. sukses selalu ^_^