1. Which formula can be used to find the area of a triangle, one of the simplest irregular polygons, given the base and the height?

2. When decomposing an irregular polygon into triangles to calculate its area, what is NOT necessary to know?

3. What is the best method to calculate the area of an irregular polygon that can be divided into rectangles and triangles?

4. You have an irregular pentagon that can be divided into a rectangle and a triangle. If the rectangle’s area is 20 square units and the triangle’s area is 10 square units, what is the total area of the pentagon?

5. Which of the following is NOT a valid strategy for finding the area of an irregular polygon?

6. Assuming you can decompose an irregular polygon into a square with a side length of 4 units and a triangle with a base of 4 units and a height of 3 units, what is the total area?

7. In the context of calculating areas, why is it useful to decompose irregular polygons into regular shapes?

8. When calculating the area of an irregular polygon using the trapezoidal rule, what is necessary?

9. For an irregular hexagon that can be divided into three rectangles, if two rectangles have areas of 8 square units and 12 square units, and the third rectangle’s area is unknown, which piece of information is most necessary to find the total area of the hexagon?

10. What is a common mistake to avoid when calculating the area of an irregular polygon by decomposition?