Question 577693
If you are trying to find the measurement of angle C, and the measurement of angle B is 2a and measurement of angle A is a: 
1) Find the measure of angle C of a triangle ABC if 
a) measurement of angle A= a
b) measurement of angle B= 2a 

Let C = measure of angle C.


C = 180 - (a + 2a)


C = 180 - 3a


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Can you explain how to do it and solve the problem. Also if the problem said:
2) Find the measerement of angle C of a triangle is
a) measurement of angle A= 60 degrees+a
b) measurement of angle B= 60 degrees-a


Let C = measure of angle C.


C = 180 - (60 + a + 60 - a)


C = 180 - 120


C = 60 degress.


Done!