Question

B = ____ ( look at photo )

Answer 1

b = 64°

Explanation:

The sum of interior angles of a polygon is 180°(n - 2), where "n" is number of sides.

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180°(6 - 2) = 720°

114° + (b + 49°) + (2b - 25°) + 142° + (b + 39°) + (3b - 47°) = 720°

7b + (114° + 49° - 25° + 142° + 39° - 47°) = 720°

7b + 272° = 720°

7b = 448°

b = 64°