Question

Two angles of a quadrilateral are ___ if the angles share a common side

Answer 1

The two angles of a quadrilateral are adjacent if the angles share a common side.

• The quadrilateral is a polygon that has four sides. And the sum of all the four angles of the quadrilateral is 360°.
• The angles formed by sharing a common side of a quadrilateral are called adjacent angles. And the sum of adjacent angles of the quadrilateral is 180°.
• The angles formed from two sides of the quadrilateral but non of the side is common are called opposite angles. And the sum of two opposite angles of the quadrilateral is also 180°.