For each situation below, decide if
is the measure of a central angle of an equilateral triangle; is the measure of an interior angle of a regular pentagon.
The central angle of the triangle is
divided by , which is .
Is there enough information given?
What do you need to know?
Third side is approximately
units, so is opposite the greater side and must be greater than
What does this equation tell you?
Find the lengths of the unknown sides.