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x° + 35° = 180°
x = 180° - 35° = 145°
2) yg ada dalam segitiga
y + 26° + 63° = 180
y = 180° - 89° = 91°
pelurus sudut y = 89°
sudut x = 180° - 89° = 91°
1) x+27+35 = 180
x = 180-27-35
x = 118°
2) y+26+63 = 180
y = 180-26-63
y = 91°
x = 117 (dalam berseberangan dgn pelurus 63°)
semoga membantu :)