Question

Tolong bantu menjawab No 13 & 14 dilengkapi dgn caranya

Answer 1

(3a+50)°+2a°=180° 5a°+50=180° 5a°=180°-50° 5a°=130° a°=130°/5 a°=26 ---> AOB=3a°+50° AOB=3(26)°+50° AOB=78°+50° AOB=128°

Answer 2

13. 3a+50+2a = 180 (sudut pelurus)
5a = 180-50
5a = 130
a = 130/5 =26

AOB= 3a+50 = 128

14. ada 18 pasang
garis vertikal ada 4 buah maka terbentuk 6 pasangan garis
jadi total pasangan garis sejajar = 3 x 6 = 18 pasangan