Exterior angle what am I doing wrong?
posted by bart .
Find the measure of the indicated exterior angle.
Exterior angle is: 197-5n
Two interior angles are: 5n+21 and n+11
I set it up as:
but this does not make sense.
165 = 11 n makes sense if n = 15
Where are your angles being measured? Why should the sum of two interior angles equal an exterior angle?
how do you set the problem up wrong