Question

Hey Brainly Users!!

Prove the following given in the attachment....

Answer 1

here is your solution friend

Prove
interior angle of Pentagon
= (n-2)180
= (5 -2)180=540
Only one angle = 540/5=108
Then
angle 1 = angle2 ( V.O.A)
angle x = angle x (V.O.A)
angle 1 + angle 2 + 2x=360
angle 1+ angle 2= 216
=> 216+2x=360
=> x=72
All triangles are congruent by SAS criterion
A + B + C + D +E+10x=180×5
A+B+C+D+E+10×72=900
A+B+C+D+E=180
PROVED