The angle A of a triangle ABC is 20% less than the sum of other two angles. If angle C is times angle B, then find the value of angle B.

0

step-by-step explanation:

parrallelograms have two (2) sets of parallel sides.

line ad should be parrallel to line bc.

line ab should be parrallel to line cd.

if point b is 1 above point a (or a+1=b), then point c must be 1 above point d (or d+1=c).

if d is at -1, and c = d+1, then c= (-1)+1 which equals 0.