sum of interior angles of a heptagon = 5(180) = 900
so we have
520 + x + x + (3/2)x = 900
2x + 1.5x = 380
x = appr 108.57°
take it from here
The sum of the measures of four of the angles of a heptagon is 520. Two of the remaining three angles are congruent. The other remaining angle is 3/2 the measure of one of the two congruent angles. Find the measures of the remaining angles.
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1 answer