20 points + brainliest, give explanation

The answer is 72 degrees Z is also 180 by the way

Step-by-step explanation:

A straight line is 180 so subtract 108 and you will get the angle 72 degrees

Step-by-step explanation:

Since Angle BCD is parallel to EDC, it means they both equal 108 degree. So x = 108

the supplementary angle for 108 is 72 degree, which means Angle c = Angle y, so angle y = 72 degrees.

all angles in a triangle = 360, so use the formula to find out what angle z is

360 = 72 + 72 + z

360 = 144 + z

360 - 144 = z

216 = z

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer