Question

Find the missing angle

Answer 1

105

Explanation:

The missing angle is supplementary to the missing inside angle of the triangle shown.

to find the missing angle in the triangle, set up your formula as

180=25+80+x

180-25-80=x

75=x

The missing angle is then 180-75=105

Answer 2

105

Explanation:

The sum of the opposite interior angles of a triangle is equal to the exterior angle

25+80 = ?

105 = ?