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faktor pengli = x
jmlh sudut penyiku = 90
maka :
sudut + penyiku = 90
2x + 3x = 90
5x = 90
x = 90/5
x = 18
jdi besr sudut tersebut = 18 x 2 = 36
jumlh sudut pelurus = 180
jdi :
Sudut + pelurus = 180
36 + x = 180
x = 180-36
x = 144⁰
jdi pelurus sudut tersebut = 144⁰