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angle a + angle b = 180 (straight angle)
2x + 3x = 180
5x = 180
x = 180/5
x= 36
angle a = 2 x 36
= 72
angle a = angle 4 (opposite angles )
angle 4 = 72
2x + 3x = 180
5x = 180
x = 180/5
x= 36
angle a = 2 x 36
= 72
angle a = angle 4 (opposite angles )
angle 4 = 72
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