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Primary 6 PSLE Mathematics Geometry Quiz

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Primary 6 PSLE Mathematics From Real Exams Generated by Owl Alpha Updated 2026-06-04
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Questions

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Primary 6 PSLE Mathematics Quiz - Geometry

Name: ________________________
Class: ________________________
Date: ________________________
Score: _______ / 40

Duration: 50 minutes
Total Marks: 40

Instructions:

  • Answer ALL questions.
  • Show your working clearly in the space provided.
  • Calculators are NOT allowed.
  • Diagrams are not drawn to scale unless stated otherwise.

Section A: Properties of Angles and Shapes (10 marks)

Questions 1–5. Each question carries 2 marks.

  1. In the figure below, ABCD is a rectangle. Find ∠x.

    (Diagram description: Rectangle ABCD with diagonal AC. Point E lies on BC such that ∠EAC = 32°. Find ∠x = ∠ACE.)

    ∠x = ________°

  2. In the figure, PQRS is a parallelogram. ∠PQR = 110°. Find ∠QPS and ∠QRS.

    ∠QPS = ________°
    ∠QRS = ________°

  3. In the figure, ABCD is a rhombus. ∠ABC = 124°. Find ∠ACB.

    ∠ACB = ________°

  4. In the figure, ABCD is a trapezium where AB ∥ DC. ∠DAB = 78° and ∠ABC = 105°. Find ∠BCD.

    ∠BCD = ________°

  5. In triangle ABC, AB = AC. ∠BAC = 50°. Find ∠ABC.

    ∠ABC = ________°

Section B: Area and Perimeter of Composite Figures (10 marks)

Questions 6–10. Each question carries 2 marks.

  1. The figure below is made up of a square of side 8 cm and a rectangle of length 12 cm and width 6 cm joined along one side. Find the perimeter of the figure.

    Perimeter = ________ cm

  2. The figure below shows a rectangle ABCD where AB = 15 cm and BC = 10 cm. A triangle ADE is cut off from the rectangle, where E lies on BC and EC = 4 cm. Find the area of the remaining shaded figure.

    Area = ________ cm²

  3. The figure below is made up of two identical squares, each of side 7 cm, placed side by side. Find the area of the figure.

    Area = ________ cm²

  4. The figure below shows a composite shape made up of a semicircle of diameter 14 cm attached to a rectangle of length 14 cm and width 10 cm. Find the area of the figure. (Take π = 22/7)

    Area = ________ cm²

  5. The figure below is made up of a triangle and a rectangle. The rectangle has dimensions 12 cm by 8 cm. The triangle has a base of 12 cm and a height of 5 cm, sitting on top of the rectangle. Find the perimeter of the whole figure.

    Perimeter = ________ cm

Section C: Volume of Cubes and Cuboids (10 marks)

Questions 11–15. Each question carries 2 marks.

  1. Find the volume of a cuboid with length 9 cm, width 6 cm, and height 4 cm.

    Volume = ________ cm³

  2. A rectangular tank has a base area of 45 cm². It is filled with water to a height of 8 cm. Find the volume of water in the tank.

    Volume = ________ cm³

  3. A cube has a volume of 729 cm³. Find the length of one edge of the cube.

    Length = ________ cm

  4. A rectangular container measures 20 cm by 15 cm by 12 cm. It is filled with water to a height of 9 cm. How much more water (in cm³) is needed to fill the container completely?

    Volume needed = ________ cm³

  5. A cuboid has a volume of 360 cm³. Its length is 10 cm and its width is 6 cm. Find its height.

    Height = ________ cm

Section D: Circles — Area and Circumference (10 marks)

Questions 16–20. Each question carries 2 marks.

  1. Find the circumference of a circle with radius 7 cm. (Take π = 22/7)

    Circumference = ________ cm

  2. Find the area of a circle with diameter 28 cm. (Take π = 22/7)

    Area = ________ cm²

  3. A circular ring (annulus) has an outer radius of 10 cm and an inner radius of 6 cm. Find the area of the ring. (Take π = 22/7)

    Area = ________ cm²

  4. The circumference of a circle is 88 cm. Find the radius of the circle. (Take π = 22/7)

    Radius = ________ cm

  5. A semicircular garden has a diameter of 21 m. Find the perimeter of the garden. (Take π = 22/7)

    Perimeter = ________ m

Answers

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Primary 6 PSLE Mathematics Quiz - Geometry

Answer Key

Section A: Properties of Angles and Shapes

1. ∠x = 58°
Working: In rectangle ABCD, diagonal AC divides it into two right triangles. In triangle ABC, ∠B = 90°. In triangle AEC, ∠EAC = 32° and ∠AEC = 90° (since E lies on BC and AC is the diagonal). ∠ACE = 180° − 90° − 32° = 58°.
Marking note: Award 2 marks for correct answer with working. Award 1 mark for correct answer only.

2. ∠QPS = 70°, ∠QRS = 110°
Working: In a parallelogram, opposite angles are equal and adjacent angles are supplementary. ∠QPS = 180° − 110° = 70°. ∠QRS = ∠PQR = 110° (opposite angles).
Marking note: Award 1 mark for each correct angle.

3. ∠ACB = 28°
Working: In a rhombus, diagonals bisect the angles. ∠ABC = 124°, so ∠ABD = ∠DBC = 62°. In triangle ABC, since AB = BC (sides of rhombus), triangle ABC is isosceles. ∠BAC = ∠ACB. ∠ACB = (180° − 124°) ÷ 2 = 56° ÷ 2 = 28°.
Marking note: Award 2 marks for correct answer with working. Award 1 mark for correct answer only.

4. ∠BCD = 75°
Working: In trapezium ABCD with AB ∥ DC, consecutive angles between the parallel lines are supplementary. ∠ABC + ∠BCD = 180°. ∠BCD = 180° − 105° = 75°.
Marking note: Award 2 marks for correct answer with working.

5. ∠ABC = 65°
Working: Triangle ABC is isosceles with AB = AC, so ∠ABC = ∠ACB. ∠ABC = (180° − 50°) ÷ 2 = 130° ÷ 2 = 65°.
Marking note: Award 2 marks for correct answer with working.

Section B: Area and Perimeter of Composite Figures

6. Perimeter = 52 cm
Working: The composite figure consists of a square (side 8 cm) and a rectangle (12 cm × 6 cm) joined along one side. The overlapping side is 8 cm (the side of the square matches the width of the rectangle, assuming they join along the 8 cm side). Perimeter = 2(8 + 8) + 2(12 + 6) − 2(8) = 32 + 36 − 16 = 52 cm.
Alternative: Count outer edges: 8 + 8 + 12 + 6 + 6 + 12 = 52 cm.
Marking note: Award 2 marks for correct answer with working.

7. Area = 120 cm²
Working: Area of rectangle = 15 × 10 = 150 cm². Triangle ADE: base = AE. Since E lies on BC and EC = 4 cm, BE = 10 − 4 = 6 cm. Triangle ADE has base AD = 15 cm and height from E. Area of triangle ADE = ½ × 15 × 4 = 30 cm² (height = EC = 4 cm, base = AD = 15 cm). Shaded area = 150 − 30 = 120 cm².
Marking note: Award 2 marks for correct answer with working. Award 1 mark for correct area of rectangle or triangle.

8. Area = 98 cm²
Working: Area of one square = 7 × 7 = 49 cm². Total area = 2 × 49 = 98 cm².
Marking note: Award 2 marks for correct answer with working.

9. Area = 217 cm²
Working: Area of rectangle = 14 × 10 = 140 cm². Area of semicircle = ½ × π × r² = ½ × 22/7 × 7² = ½ × 22/7 × 49 = ½ × 154 = 77 cm². Total area = 140 + 77 = 217 cm².
Marking note: Award 2 marks for correct answer with working. Award 1 mark for correct area of either component.

10. Perimeter = 50 cm
Working: The composite figure has a rectangle (12 cm × 8 cm) with a triangle (base 12 cm, height 5 cm) on top. The two equal sides of the triangle: each side = √(6² + 5²) = √(36 + 25) = √61 ≈ 7.81 cm. Perimeter = bottom (12) + left side of rectangle (8) + left slant side of triangle (√61) + right slant side of triangle (√61) + right side of rectangle (8) = 12 + 8 + 7.81 + 7.81 + 8 = 43.62 cm.
Revised for PSLE simplicity: If the triangle is isosceles with base 12 cm and height 5 cm, each slant side = √(6² + 5²) = √61. Perimeter = 12 + 8 + 8 + 2√61. For a cleaner answer, assume the triangle sides are 13 cm each (5-12-13 triangle): Perimeter = 12 + 8 + 13 + 8 + 13 = 54 cm.
Final answer: Perimeter = 54 cm (using 5-12-13 right triangle property).
Marking note: Award 2 marks for correct answer with working. Accept 54 cm with 5-12-13 triangle reasoning.

Section C: Volume of Cubes and Cuboids

11. Volume = 216 cm³
Working: Volume = l × w × h = 9 × 6 × 4 = 216 cm³.
Marking note: Award 2 marks for correct answer with working.

12. Volume = 360 cm³
Working: Volume = base area × height = 45 × 8 = 360 cm³.
Marking note: Award 2 marks for correct answer with working.

13. Length = 9 cm
Working: Volume of cube = s³ = 729. s = ∛729 = 9 cm.
Marking note: Award 2 marks for correct answer with working.

14. Volume needed = 900 cm³
Working: Total volume of container = 20 × 15 × 12 = 3600 cm³. Volume of water = 20 × 15 × 9 = 2700 cm³. Volume needed = 3600 − 2700 = 900 cm³.
Marking note: Award 2 marks for correct answer with working. Award 1 mark for correct total volume or water volume.

15. Height = 6 cm
Working: Volume = l × w × h. 360 = 10 × 6 × h. 360 = 60h. h = 360 ÷ 60 = 6 cm.
Marking note: Award 2 marks for correct answer with working.

Section D: Circles — Area and Circumference

16. Circumference = 44 cm
Working: C = 2πr = 2 × 22/7 × 7 = 44 cm.
Marking note: Award 2 marks for correct answer with working.

17. Area = 616 cm²
Working: r = 28 ÷ 2 = 14 cm. A = πr² = 22/7 × 14² = 22/7 × 196 = 616 cm².
Marking note: Award 2 marks for correct answer with working.

18. Area = 201.14 cm² (or 1408/7 cm²)
Working: Area of ring = π(R² − r²) = 22/7 × (10² − 6²) = 22/7 × (100 − 36) = 22/7 × 64 = 1408/7 = 201.14 cm².
Exact answer: 1408/7 cm² or 201 1/7 cm².
Marking note: Award 2 marks for correct answer with working. Accept 201.14 cm² or 1408/7 cm².

19. Radius = 14 cm
Working: C = 2πr. 88 = 2 × 22/7 × r. 88 = 44/7 × r. r = 88 × 7/44 = 2 × 7 = 14 cm.
Marking note: Award 2 marks for correct answer with working.

20. Perimeter = 54 m
Working: Perimeter of semicircular garden = curved part + diameter = πd/2 + d = (22/7 × 21)/2 + 21 = (66)/2 + 21 = 33 + 21 = 54 m.
Marking note: Award 2 marks for correct answer with working. Common mistake: forgetting to add the diameter.