The sum of the co-interior angles is always ${180}^{\circ }$.

Q. Sum of co-interior angles is ${180}^{\circ }$

Q. Sum of all interior angle of a triangle is always less than ${180}^{\circ }$.

Q. Sum of interior angles of triangle is ${180}^o$, and that for a quadrilateral is ${360}^o$, then sum of interior angles of a polygon having n sides is

Q. The sum of interior angles of a triangle is always _______.

Q. Sum of the interior angles of a triangle is ${180}^{\circ }$