Question

Solve for?

^^ How would I be able to find the other number that is missing?

Answer 1

66°

Explanation:

For this type of question, first you should know that all the three angles of a triangle sum up to 180°. Let's say the three angles are ∠a, ∠b and ∠c, so if we add the values of all these three angles they would always be equal to 180°.

In this question, we are given the measure of two angles and are asked to find the third angle:

75° + 39° + ? = 180°

? = 180° - 75° + 39°

? = 66° Answer

Hope that helps...

Answer 2

66° by adding up 75° and 39°, we get 114°.

since all triangles equal 180°, 180° minus 114° is 66°