Problema Solution
Angles A, B, and C are the angle in a triangle. Angle C is three times as big as angle A and angle B is 25 degree more than angle A. Find the measure of angle A in degrees. Write the equation then solve.
Answer provided by our tutors
angle A: a
angle B: 25 + a
angle C: 3a
the angles of a triangle sum to 180 degrees
so
A + B + C = 180
a + 25 + a + 3a = 180
5a + 25 = 180
5a = 155
a = 31
so angle A is 31 degrees