SOLUTION: In a triangle ABC, angle B is 4 times angle A and angle C is 15 degrees less than 5 times angle A. Find the size of the angles.

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Question 317562: In a triangle ABC, angle B is 4 times angle A and angle C is 15 degrees less than 5 times angle A.
Find the size of the angles.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
The sum of the angles in a triangle is 180.
A%2BB%2BC=180
A%2B4A%2B%285A-15%29=180
10A-15=180
10A=195
highlight%28+A=19.5%29
.
.
B=4A
highlight%28B=78%29
.
.
C=5A-15
highlight%28+C=82.5%29