An isosceles triangle has two sides and two angles equal. The diagonals of a parallelogram bisect each other. A pair of opposite angles of a kite are supplementary. A straight angle measures 180 degrees. A reflex angle measures between 90 and 180 degrees.
Angles formed by a number of rays with a common point are supplementary.
The exterior angle of a triangle is equal to the sum of the two interior opposite angles. The opposite angles of a parallelogram are supplementary. The diagonals of rhombus bisect each other at right angles. A parallelogram is a rectangle with all angles equal. 27 Supplementary angles are two angles whose sum is 360 degrees.