What is the measure of the third angle of a triangle if one angle measures x degrees and the second angle measures y degrees?

Question

This is a question on my homework and I don't know how to solve it.

Answer 1

The three angles of any triangle always add up to be 180.

 

So if x, y, and z are the three angles, then x + y + z = 180.

 

If z is the third angle, then z = 180 - x - y.

 

Another way to look at this is that you start with 180 and you subtract away the two angles you know, x and y, which leaves you an amount for the third angle.

Answer 2

A Triangle is 180º. The sum of given two angle measure is (x+y)º . So, The third triangle would be (180º-(x+y)º)º .