Question

A triangle has two angles that have measures of 92° and 31°. What is the measure of the third angle of the triangle?

A 23
B 57
C 43
C 33

Answer 1

57°

Explanation:

so triangle angles all add up to 180 so its a matter of subtraction

`92 + 31 + x = 180`

x is the 3rd angle we need to find

`92 + 31 + x = 180\\\\92 + 31 = 123\\\\180 - 123 = 57\\`

so the missing 3rd angle is 57°

Answer 2

57⁰

Explanation:

A triangle measures 180⁰, so to find the answer to these questions you just have to add the degrees you know

92⁰+31⁰=123⁰

after you take 180⁰ and subtract the degrees you know your triangle has

180⁰-123⁰= 57⁰