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Verified answer
Jawabsegi empat talibusur
a. <B + <D = 180
5x+ 4x = 180
9x = 180
x = 20
b.<B = 5x = 5(20)= 100
c. <A + <B = 180
2y + y + 18 = 180
3y = 180- 18
3y = 162
y = 54
d. <C = y + 18 = 54+ 18 = 72