The given figure is divided into 3 equal parts. To calculate the total area of the figure, which of the following equations can be used?

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Solution

● As the given figure is divided into 3 equal parts, all 3 rectangles have the same lengths and widths.
● Areas of all 3 rectangles—R1, R2, and R3—will be equal.

● So, we can use either of the following equations to calculate the total area of the figure.
Equation 1: Total area = 3 $\times$ Area of each rectangle
Equation 2: Total area = Area of R1 + Area of R2 + Area of R3

Hence, option D is correct.

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