Five of the angles of a hexagon are each 115°. Calculate the measure of the sixth angle.
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answer is 145 degree
Five angle of hexagon is 115∘
each sum of all angles of hexagon = 720
∴ let sixth angle of hexagon be x
x+115+115+115+115+115=720
x+575=720
x=720−575
x=145∘
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