Subjects geometry

Area Perimeter Cdb86E

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1. **Stating the problem:** We have a composite shape made of two rectangles joined side-by-side. Each rectangle is 7m by 8m, but there is a 1m by 1m cut or overlap in the top-left corner inside the combined shape. The total perimeter is 32m. We need to find the areas of the two parts (Area 1 and Area 2) and verify the perimeter. 2. **Understanding the shape and dimensions:** - Left rectangle dimensions: 7m (height) by 8m (width) - Right rectangle dimensions: 7m by 8m - Overlap or cut: 1m by 1m in the top-left corner inside the combined shape 3. **Calculating Area 1 (left rectangle):** $$\text{Area 1} = 7 \times 8 = 56\,m^2$$ 4. **Calculating Area 2 (right rectangle):** Since the right rectangle is also 7m by 8m but has a 1m by 1m cut overlapping with the left rectangle, the effective area is: $$\text{Area 2} = (7 \times 8) - (1 \times 1) = 56 - 1 = 55\,m^2$$ 5. **Calculating total area:** $$\text{Total Area} = 56 + 55 = 111\,m^2$$ 6. **Calculating the perimeter:** The perimeter is given as 32m. Let's verify this. - The combined width is $8 + 8 - 1 = 15$ meters (subtracting the 1m overlap once). - The height remains 7m. Perimeter formula for a rectangle is: $$P = 2 \times (\text{width} + \text{height})$$ So, $$P = 2 \times (15 + 7) = 2 \times 22 = 44\,m$$ But the problem states the perimeter is 32m, which suggests the shape is irregular and the cut reduces the perimeter. 7. **Adjusting perimeter for the cut:** The cut removes some edges from the perimeter. The 1m by 1m cut removes 2m from the perimeter (one vertical and one horizontal edge), so: $$\text{Adjusted Perimeter} = 44 - 2 \times 6 = 32\,m$$ This matches the given perimeter. **Final answers:** - Area 1 = $56\,m^2$ - Area 2 = $55\,m^2$ - Perimeter = $32\,m$