| Circumference | The perimeter of a circle that can be found by multiplying the diameter by pi (about 3.14) |
| How to find the area of a circle | Pi (3.14) multiplied by the radius squared |
| How to find the area of a triangle | Base times Height divided by 2 |
| How to find the area of a trapezoid | The two bases (the top and bottom) added up, multipled by the height and divided by 2 |
| How to find the diameter/radius of a circle using the circumference | The Circumference divided by 3.14 (and then divide that by 2 if you are want the radius |