Question

please answer the question

Answer 1

let the number of sides be x.

10 right angle=90*10=900 degree.

let each angle be n.

ATQ:
900/x=n

BUT x=n(number of side=number of angles)

so,

900/x=x
x^2=900
x=30 degree.

number of sides =30

done.:-)

Answer 2

sum of all angles of a polygon with n sides=(n-2)×180
here sum is 10 right angles=10×90
(n-2)180=10×90
(n-2)180=900
$n - 2 = \frac{900}{180} \\ n - 2 = 5 \\ n = 7$