Question

please help me in question number 8 please please guys

Answer 1

sum of all interior angle = (n-2) pie
= (5-2) pie
= 3pie

Answer 2

As sum of all the angles of a quadrilateral is 360 degree

And of triangle it is 180 degree

In the figure we can see that a quadrilateral is attached to the triangle so the sum of all the angles = 360+180=540

You can also calculate it by the formula (n-2)180 where n is the no. of sides of the figure.............you can check it by putting 5 in place of n in the formula...........

That is.........(5-2)180=3*180=540