Each interior angle measures 160 degrees
Use a protractor
it's 90 degrees
It is 90 degrees or pi/2 radians.
Interior angle + Exterior angle = 180 So Interior angle = 180 - Exterior angle Interior angle = 4*Exterior angle + 30 Substitute for Interior angle: 180 - Exterior angle = 4*Exterior angle + 30 Collect like terms: 150 = 5*Exterior angle Divide by 5: Exterior angle = 30 deg Therefore number of sides = 360/30 = 12
It will have 14 sides and each interior angle will measure 2160/14 degrees
Each interior angle measures: 152o 18' 27.69''
Each interior angle is 157.5
Each interior angle measures 144 degrees
Each interior angle is 165 degrees
120
Each interior angle measures 160 degrees
Use a protractor
180
10000000000000
60
Interior angle: 144 degrees