Four interior angles of a pentagon measure 85°, 90°, 95°, and 110°. what is the smallest measure of the pentagon's exterior angles?
a 5°
b 20°
c 70°
d 85°

An interior and exterior angle add up to 180 degrees.
+
The sum of all the angles in a pentagon is 540 degrees, using that find the missing angle:
85+90+95+110=380
540-380=160

Then, find the exterior angle measure for 160 degrees (160 is interior):
180-160=20

The answer is B) 20