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Questions and answers by
michael mwanzia RONGO university.
Answers (1)
first let's find value of x where 3x°+(x-20)°=180° 3x +x -20 =180 4x=180+20 4x=200 4x/4=200/4 x=50° then number of sides = 360/(exterior angle) of a regular polygony therefore sizes=360/30 sides= 12
