Naplan Year 3 Numeracy - Geometry & Measuremen

Home › Numeracy Guide › Geometry & Measurement

Year 3 Numeracy – Geometry & Measurement Practice

These challenging questions help Year 3 students master shapes, perimeter, area, angles, mass, capacity, and length with multi-step reasoning aligned to NAPLAN.

← Time & Money Next: Full Numeracy Test →

Practice Questions

1. A rectangle has a length of 12 cm and a width of 5 cm. What is its perimeter?

A. 17 cm
B. 34 cm
C. 60 cm
D. 30 cm

2. A square has sides of 8 m. What is its area?

A. 16 m²
B. 32 m²
C. 64 m²
D. 48 m²

3. Which shape has 4 equal sides and 4 right angles?

A. Rectangle
B. Square
C. Triangle
D. Rhombus

4. A triangle has a base of 6 cm and height of 4 cm. What is its area?

A. 12 cm²
B. 10 cm²
C. 24 cm²
D. 8 cm²

5. Which unit would you use to measure the mass of a watermelon?

A. grams (g)
B. kilograms (kg)
C. litres (L)
D. centimetres (cm)

6. Convert 2500 mL to litres.

A. 2.5 L
B. 25 L
C. 0.25 L
D. 250 L

7. A rectangle has a length of 7 cm and a width of 3 cm. What is its area?

A. 10 cm²
B. 21 cm²
C. 20 cm²
D. 24 cm²

8. Which shape has 3 sides?

A. Triangle
B. Rectangle
C. Square
D. Pentagon

9. A bottle contains 1.5 L of water. How many mL is this?

A. 150 mL
B. 1500 mL
C. 15 mL
D. 15000 mL

10. A cube has a side length of 4 cm. How many faces does it have?

A. 4
B. 5
C. 6
D. 8

11. A path around a square garden measures 40 m. What is the length of one side?

A. 5 m
B. 10 m
C. 12 m
D. 15 m

12. Which shape has only one curved side?

A. Circle
B. Oval
C. Rectangle
D. Triangle

13. A box has a length of 10 cm, width of 5 cm, and height of 2 cm. What is its volume?

A. 10 cm³
B. 50 cm³
C. 100 cm³
D. 20 cm³

14. A jug holds 3 L of water. You pour 1250 mL into a glass. How much water remains?

A. 1.75 L
B. 2.75 L
C. 1.25 L
D. 2.25 L

15. Which angle measures exactly 90°?

A. Right angle
B. Acute angle
C. Obtuse angle
D. Reflex angle

16. Convert 750 g to kilograms.

A. 0.075 kg
B. 0.75 kg
C. 7.5 kg
D. 75 kg

17. A rectangle has a length of 15 cm and a width of 4 cm. What is its perimeter?

A. 38 cm
B. 30 cm
C. 36 cm
D. 35 cm

18. How many edges does a cuboid have?

A. 8
B. 10
C. 12
D. 14

19. Which measurement is the smallest?

A. 1 km
B. 100 m
C. 1000 m
D. 1 m

20. A liquid container holds 2.5 L. You drink 750 mL. How much is left in litres?

A. 1.75 L
B. 1.85 L
C. 1.65 L
D. 1.25 L

Answer Key

1. B
2. C
3. B
4. A
5. B
6. A
7. B
8. A
9. B
10. C
11. B
12. A
13. C
14. A
15. A
16. B
17. A
18. C
19. D
20. A

Related Year 3 Practice Pages

• Year 3 Numeracy Guide
• Addition & Subtraction
• Multiplication & Division
• Fractions & Decimals
• Time & Money

© 2025 OmIshaan's SmartKidsPrep