Question

The measure of one base angle in an isosceles triangle is 20 degrees. The measure of the largest angle in the triangle is
A) 20 degrees
B) 90 degrees
C) 140 degrees
D) 160 degrees
oobleck
the other base angle is also 20
since the three add to 180, ...
nay
Determine the measure of <C, in degrees, of the isosceles triangle shown below