Interior Angle And Exterior Angle Of Triangle. Properties of Exterior Angles of a Triangle An exterior angle of a triangle is equal to the sum of the two opposite interior angles thus an exterior angle is greater than any of its two opposite interior angles. In a triangle each exterior angle has two remote interior angles.
The sum of the interior angles of a triangle is always 180. Supplementary angles are angles that add to make a straight angle or straight line 180 180. Properties of Exterior Angles of a Triangle An exterior angle of a triangle is equal to the sum of the two opposite interior angles thus an exterior angle is greater than any of its two opposite interior angles.
In the above triangle a b c are interior angles while d is an exterior angle.
For Teachers for Schools for Working Scholars. For ABC Angle sum property of triangle declares that Sum of all the interior angles of the triangle is 180. An exterior angle of a triangle or any polygon is formed by extending one of the sides. You create an exterior angle by extending any side of the triangle.