a. Find the area of a triangle in which A=60degrees, b=182.5cm,c=160cm .
b. Calculate the area of a regular fifteen-sided figure inscribed in a circle of radius 10cm.
plz help thank you for any help.
For the second one the apothem is more of a visual concept, so look here and see if you can glean how to do it from that. If not post back
Apothem - Wikipedia, the free encyclopedia