Question

find the value of a and b for the regular Pentagon

please answer it fast .
with steps please . I want steps
a= 72 , b= 108
these are the answers

please say steps also please ​

Answer 1

to find the sum of the int angles of any regular polygon the formula is : {(2n-4)*90} where n is the no of angles .

•°• sum of int angles of regular Pentagon = (2*5-4)*90 = 6*90=540

°•° all sides r regular •°• all sides r same •°• all angles r same

let each angle be x

•°• 5x = 540 => x = 108 •°• every angle = x = 108

•°• b = 108

a + b = 180 [ °•° strt line ] => a = 180-108 => a = 72