Question

Prove that the sum of the four angles of a quadrilateral is 360o.

Answer 1

first of all draw a diagonal of that quadrilateral.Then find the measure of the two triangles and then add it up you will get 360°

Answer 2

first draw a quadrilateral.
then join one of its diagonal.
then two triangles will form.we already know that sum all the angles of a triangle is 180 degree. so add both the triangles.
180degree+180 degree= 360 degree.

hence proved.