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.