19. Judging from the protractor provided, estimate the measure of each angle to the nearest multiple of 5° (such as, 20°, 25°, 30°, etc.). a) mZ1 b) mZ3 80 100 100 80 90 110 70 70 110 60 120 120 60 50 130 130 50 `4. 2 160 150 170 10 140 20 180 140 081

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