Find the missing angle measure of the triangle below. Show your work or provide an explanation.
Mathematics
Cecely
Question
Find the missing angle measure of the triangle below. Show your work or provide an explanation.
2 Answer

1. User Answers Anonym
A triangle always adds up to 180*.
Knowing that we add up the angles 45* and 80* to get 125*
Then you do 180*  125* to get 55*
So the angle would be 55*. 
2. User Answers plague122
the equation for finding missing angle measures is ∠1+∠2+∠3=180° so you put 45 and 80 into the equation: 45+80+∠3=180 then you just subtract 45 and 80 from both sides to get: ∠3=55 so your answer is 55°