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Rectangle Perimeter Grid Practice

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Rectangle Perimeter Grid Practice

A community garden is planning rectangular beds on a square grid. Each grid square represents 1 metre. Solve the perimeter puzzles, then plan a bed that fits the brief. Perimeter is the distance around the outside of a shape.

Read the grid

The dimensions of each rectangle are given in the text. Use them to find the perimeter.

Bed A: 6 squares long and 3 squares wide. Find the perimeter.

Bed B: 8 squares long and 5 squares wide. Find the perimeter.

1.A rectangular bed has a length of 9 m and a width of 4 m. Which calculation gives its perimeter?

9 × 4 = 36 m
9 + 4 = 13 m
9 + 4 + 9 + 4 = 26 m
2 × (9 × 4) = 72 m

2.A rectangular path around a garden is 32 m long in total. One side is 10 m. How long is the other side? Show the relationship you use.

3.A square compost area has sides of 7 m. Work out its perimeter and explain why you can use multiplication.

Plan a bed that meets the brief

The garden group needs a rectangular herb bed with whole-number side lengths, a perimeter of exactly 30 m, and a length greater than its width. Sketch one possible plan in the space below. You do not need to use a grid.

Label the length and width on your rectangle. Then show the perimeter calculation below your sketch.

4.Give one pair of whole-number dimensions that meets the herb-bed brief, and verify its perimeter.

5.A roll of edging is 34 m long. The garden group chooses a rectangular bed measuring 12 m by 5 m. Is there enough edging? If so, how much is left?

6.A gardener says a rectangle measuring 8 m by 3 m has a perimeter of 24 m because 8 × 3 = 24. Explain the mistake and give the correct perimeter.

7.True or false: If the length of a rectangle is doubled while its width stays the same, its perimeter always doubles. Explain using a rectangle that is 6 m by 2 m.

8.A rectangular garden has a perimeter of 40 m and a width of 8 m. Find its length. Write an equation or show your steps.