Answer:
The combined area of the shaded triangles in Figure 1 is equal to the combined area of the shaded triangles in Figure 2. The area of the unshaded square in Figure 1 can be represented by 4c. The combined area of the two unshaded squares in Figure 2 can be 4a+4b. The areas of the squares in Figure 1 and Figure 2 show that 4a+4b=4c.
Explanation:
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