five of the angles of a hexagon are each 115 degrees calculate the measures of the 6th angle
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115+115+115+115+115+x=720
575+x=720
x=720-575
x=145
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2
Five angle of hexagon is 115
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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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