Question

calculate the each interior angle and number of diagnols of a decogon

Answer 1

hey, here is your answer...
I done it on my own...

thank you.:)

Answer 2

The interior angle of decagon can be calculated using the formula (n-2)* 180/n,where n is the number of sides of the figure
for example in the case of triangle,where n=3, interior angle=1*180=180/3=60
in the case of decagon the nunber of sides =10 and interior angle = 8*180/10=144
for the number of diagonals simply divide the no of sides by 2 ( since a diagonal is a line joining the opposite vertices of polygons) hence 10/2 =5