tolong dua-duanya ya dan caranya

23). 2x + 15 + 4x + 9 = 180
2x + 4x = 180 - 15 - 9
6x = 156
x = 26

<PQS = 2x + 15
=2(26) + 15
=67°
Penyiku <PQS
=90 - 67
=23° (A)


24.) <EBC = 180-102
=78°
<ECD = <EBC + BEC
148 = 78 + a
a = 148 - 78
a = 70 (B)