Posted by Gail on .
in the triangle ABC, the measure of angle b=21 more than three times the measure of angle A. the measure of angle C=54 more than the measure of angle A. find the measure of each angle

Algebra2 
bobpursley,
The sum of the three angles is 180deg
b=21+a
c=54+a
add a+b+c and set = to 180