Question

find the measure of the third angle of a triangle if the measures of the other two angles are given 118.6 and 42.3

Answer 1

`\boxed{\bold{\huge{\boxed{\mathrm{Third\ Angle = 19.1\ degrees}}}}}`

Explanation:

The interior angles of a triangle add up to 180 degrees. So, to find an unknown interior angle, we need to subtract rest of the two angles from 180 degrees.

So,

Third Angle = 180 - 118.6 - 42.3

Third Angle = 19.1 degrees