You use this for the coins
Area of a circle:
[tex]A=\pi\cdot r^2[/tex]
r is the radius and it can be obtaided more easily if you measure the diameter of the circle and then divide it into 2.
Circunference or perimeter of a circle:
[tex]C=2\cdot\pi\cdot r[/tex]
--------------------------------------------
You use this for the bills:
Aera of a rectangle:
[tex]A=l\cdot w[/tex]
Perimeter of a rectangle:
[tex]P=2l+2w[/tex]
------------------------
The face a pyramid has the shape of a trianlge:
Area of a triangle:
[tex]A=\frac{1}{2}b\cdot h[/tex]
Perimeter of a triangle:
[tex]P=b+a+a[/tex]
