The measures of all angles in a regular octagon are (4x + 12)°. how would you find the value of x?

2 answers

The sum of the interior angles of an n-gon is
180(n-2)

so here n=8.
Find the sum and then set it equal to 4x+12
solve for x
d is between ce=6x cd=4x+8 de=7 units find ce