what is angle a?
B=105
C=100
please help
Sum of interior angles of n-gon = (n-2)*180 degrees = 540
So, ∠A = 540 - 410 = 130 degrees
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Sum of interior angles of n-gon = (n-2)*180 degrees = 540
So, ∠A = 540 - 410 = 130 degrees