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90
no
270
170° because: (130+105+90+45) = 370° regular: nAngle = Each Angle (for regular ones) = [(n-2)/n] * 180° 5Angle = [(5-2)/5]*180° = (3/5)*180 = 540/5 = 120° not regular: Sum(Complete) - Rest Sum= 540° Rest = 370° 540-370= 170°
Interior? Exterior? Interior= 180 x (n-2) when 'n' is the number of sides so for a 5 sided shape it is 180 x 3 = 540 degrees. 540=all the angles together 540 divided by the number of sides/angles is 108 Exterior= 360 divided the number of sides/angles (360 divided by 5) = 72 The total agle is 360 degrees but ech exterior agle is 72 degrees