Question

Tolong donk Nomor 13 sama 15. kalau bisa pake cara

Answer 1

13. 2b = a + b
2b - b = a
b = a

3a + 2b = 180
3b + 2b = 180
5b = 180
b = 180 ÷ 5
b = 36°

15. x = 4y

x + 2y + x = 180
2x + 2y = 180
2 (4y) + 2y = 180
8y + 2y = 180
10y = 180
y = 180 ÷ 10
y = 18°