7. Use the moving and additivity principles to de- termine the area, in square inches, of the shaded flower design in Figure 12.18. In determining the area of the shape, use no formulas other than the one for areas of rectangles. Explain your reason- ing clearly in 2 in. Figure 12.18 A flower design.

What multiplication facts are illustrated by these rectangular area models? a. b. C.

8. Summarize two methods for determining the area of a trapezoid. How are these methods the same and how are they different in terms of what you had to think about when executing them? 9. Define it as a geometric concept (i.e., do not simply state its value). Then use this definition to explain the circumference formula for a circle. (explaining mathematically is ok)