A rectangle has an area of \(50\text{ cm}^{2}\). The dimensions of the rectangle are multiplied to form a new rectangle with an area of \(200\text{ cm}^{2}\). By what number were the dimensions multiplied?
Sami put two trapezoids with the same dimensions together to make a parallelogram.
The formula for the area of a trapezoid is \(\cfrac{1}{2}(\text{b}_{1} + \text{b}_{2})\text{h}\). Explain why the bases of a trapezoid need to be added in the formula.