Question

No 19 , 20 caranya gimana??

Answer 1

Answer 2

19) 3x+5 + 2x-45 = 180
5x-40 = 180
5x = 180+40
5x = 220
x =44
jadi,
Sudut ADC = 2x-45
= 2.44 - 45
= 88 - 45
= 43˚ ....(C)



20) misal : A = suatu sudut
didapat :
180-A = 120
-A = 120-180
-A = -60
A = 60˚
jadi,
penyikunya = 90-A = 90-60 = 30˚ ....(B)