Find the measure of triangle 1 , triangle 2 and triangle 3 , if triangle 4 -> 140 degree
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total is 360
triangle 1= 1/140x360=20°
triangle 2=2/140×360=100°
triangle 3=3/140×360=100°
triangle 1+2+3+4=360
20+100+100+140=360°
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