Sum of interior angles in triangles and quadrilaterals Welcome to your Sum of interior angles in triangles and quadrilaterals quiz Please click "Next" Determine the missing angle ° Determine the measure of the missing angles They are ° each Determine the missing angle ° Determine the measure of the missing angles x = 83, y = 100 x = 100, y = 83 Determine the measure of the missing angles Each angle is ° Time is Up! Time's up