Question

The sum of the interior angles of any triangle is equal to ${180}^{\circ }$.This law is called the __________.

• A. Angle sum property of a triangle.
• B. Pythogoras theorem
• C. Triangle exterior angle theorem
• D. None of the above

Answer 1

The correct option is A Angle sum property of a triangle.

The sum of all the three interior angles of a triangle always add upto ${180}^{\circ }$.This is called the Angle sum property of a triangle.
For example, in the triangle shown below, the sum of the three interior angles, x, y and z is always ${180}^{\circ }$.
$\angle x+\angle y+\angle z$ = ${180}^{\circ }$