Question

external angle of a regular polygon is72degree. find the sum of all the internal angle​

Answer 1

Answer:

To find the sum of all interior angles of a regular hexagon :-

n-2x180°

6-2x180°

4x180°

720°

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Answer 2

we know that sum of exterior angles in any polygons is 360 °

side = 360/72

sides = 5

sum of all interior angles of a pentagon

= (5-2) 180

= 3× 180

= 540 °

I hope It will help you.