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Primary 4 Mathematics · Chapter 12 · Practice sheet

Lesson 12.4: Perimeter of Composite Figures

Name:Date:Marks:    / 15

Section A · Multiple choice 4 marks

1. All the lines meet at right angles. What is the perimeter of the figure?1 mark

8 cm3 cm4 cm3 cm
(A) 36 cm(B) 30 cm(C) 24 cm(D) 22 cm

2. All the lines meet at right angles. What is the perimeter of the staircase figure?1 mark

2 m2 m2 m2 m2 m2 m
(A) 12 m(B) 36 m(C) 24 m(D) 18 m

3. All the lines meet at right angles. What is the perimeter of the T-shape?1 mark

9 cm3 cm5 cm3 cm
(A) 42 cm(B) 27 cm(C) 31 cm(D) 34 cm

4. Two squares with sides of 6 cm are placed side by side to make a rectangle. What is the perimeter of the rectangle?1 mark

(A) 36 cm(B) 48 cm(C) 24 cm(D) 72 cm

Section B · Write your answer 11 marks

5. All the lines meet at right angles. What is the perimeter of the figure?1 mark

10 cm4 cm5 cm4 cm

6. All the lines meet at right angles. What is the perimeter of the figure?1 mark

3 m3 m3 m3 m3 m3 m

7. A square of side 3 cm is cut from a corner of a rectangle 14 cm by 6 cm. What is the perimeter of the remaining figure?1 mark

8. All the sides are equal and all the lines meet at right angles. What is the perimeter of the cross?1 mark

4 cm4 cm4 cm4 cm4 cm4 cm4 cm4 cm4 cm4 cm4 cm4 cm

9. A square of side 4 cm is cut from each of two corners of a rectangle 20 cm by 9 cm. What is the perimeter of the remaining figure?1 mark

10. All the lines meet at right angles. A fence is built round this L-shaped garden. Fencing costs $3 per metre. How much does the fencing cost?2 marks

12 m5 m5 m7 m

11. Two rectangles, each 9 cm by 4 cm, are joined along a side to make a bigger rectangle. What is the difference between the greatest and the smallest possible perimeters?2 marks

12. Ten squares with sides of 2 cm are arranged in 2 rows of 5 to make a rectangle. What is the perimeter of the rectangle?2 marks

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