下面哪两个图形的面积相同？（取 $\pi = \frac{22}{7}$ ）

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完整解法

1. Calculate the area of Figure 1 (circle).

Radius of the circle $= 14 \div 2 = 7$ cm.
Area of Figure 1 $= \pi r^2 = \frac{22}{7} \times 7^2 = 154$ cm $^2$ .

2. Calculate the area of Figure 2 (square).

Area of Figure 2 $= 12 \times 12 = 144$ cm $^2$ .

3. Calculate the area of Figure 3 (rectangle).

Area of Figure 3 $= 14 \times 11 = 154$ cm $^2$ .

4. Calculate the area of Figure 4 (triangle).

Area of Figure 4 $= \frac{1}{2} \times 14 \times 11 = 77$ cm $^2$ .

5. Compare the areas to find the two figures with the same area.

Figure 1 and Figure 3 both have an area of $154$ cm $^2$ .

答案

Figure 1 and Figure 3 (option 2)

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