45o
95o
84o
85o
Correct answer is C
x + 2x + 2x + (x + 30o) + (x + 20o) + (x - 10o) = (2n - 4) x 90o
8x + 50 o - 10o = (2 x 6 -4) x 90o
8x + 40o = 8 x 90o = 720o
8x = 720o - 40o = 680o
x = 680o8
= 85o
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