If you know the lengths of two sides of a triangle and the measure of the included angle, how many different areas are possible

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).

Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?