1. Area of Square Area of rectangle Area of parallelogram
Outside of flaps
Area of Square
Area of rectangle
Area of parallelogram
Area of trapezoid
Area of triangle
Area of irregular figures
Interior Angle measure of regular polygon
Angle Sum

2. Foldable Inside of flaps
Area of Irregular Figures
Break into familiar shapes
find their areas
add all of the areas together.
Interior angle measure of any regular polygon
180 * (n-2) / n
Angle Sum
180 * (n-2)

3. Under flaps
Under each flap, draw an example and work it out! Make sure you include units.
For example, under the area of irregular figures flap you can put the following:
Area of square: 20 * 20 = 400
Area of triangle: (20 * 14) / 2 = 140
Square + triangle: = 540
Answer: 540 sq. m