Question

find the number of sides of a regular polygon if each interior angle = 140 degree​

Answer 1

Answer:

LET THE NO OF SIDE IS n Then

$[(n-2)*180]/n = 140$

$(n-2)*180 = 140n$

$180n-360 = 140n$

$180n-140n = 360$

$40n = 360$

$n = 9$

Number of side is 9