Frequency Density
You can use the triangle to find the remaining values
Area of Sector
Perimeter of Sector
Sum of interior angles of a polygon
To find one angle in a regular polygon, divide the sum by the number of sides.
Exterior Angle of polygon
The exterior angles always add to 360
Compound Interest
This formula can also be used to find repeated percentage increases and decreases
Appreciate: means to increase, so use the top formula
Depreciate: means to decrease, so use the bottom formula