1)
x+ x -3 + 110 + 130 = 360
2x + 220 = 360
2x = 140
x = 70
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2)
Sum of interior angles = 180(6 - 2) = 180(4) = 720
2(x) + 2(x+22) +2(90) = 720
2x + 2x + 44 + 180 = 720
4x + 224 = 720
4x = 496
x = 124
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3)
Sum of interior angles = 180(5 - 2) = 180(3) = 540
Interior angle = 540 / 5 = 108
x = 180 - 108
x = 72