Rectangle Composition: Perimeter and Area

The Rectangle Composition: Perimeter and Area pages are designed to teach children how to find the perimeter and area of rectangles and more complex shapes in a clear, visual way. The first page introduces the basic ideas using simple rectangles. It explains that the perimeter is the distance around the shape and can be found by adding all sides or using the formula 2 × (length + width). The area, or the space inside the shape, is found by multiplying the length by the width. Examples with clear numbers, like a 3 cm by 2 cm rectangle, help students see how to calculate both measurements step by step.

The next section shows how to handle more interesting shapes like L-shaped figures. Children are guided to find the perimeter by “walking around” the shape, adding the side lengths. If any sides are missing, they are encouraged to reason it out using opposite or parallel sides. To find the area, they learn to break the L-shape into two rectangles, calculate each smaller area, and then add them together. Another example introduces an O-shape—a big square with a smaller square cut out of the middle. Here, kids learn that for the perimeter, they can add the edges of both the inner and outer squares, and for the area, they subtract the smaller square’s area from the larger one.

The final page provides practice problems with many shapes drawn on a 1 cm grid. Students can count the squares to find the area and trace around the edges to find the perimeter. This grid-based design encourages active learning and visual measurement, helping kids connect math formulas with real spatial patterns. The worksheet balances explanation and exploration—perfect for reinforcing geometry concepts through both guided examples and hands-on challenges.

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