WI Forward Mathematics: Geometry and Measurement 2 — Questions and Answers
Question 1: What is the area of a triangle with a base of 10 cm and a height of 6 cm?
- 60 cm²
- 30 cm² (Correct answer)
- 16 cm²
- 32 cm²
Correct answer: 30 cm²
Area of a triangle = ½ × base × height = ½ × 10 × 6 = 30 cm².
Question 2: What is the total surface area of a cube with a side length of 3 cm?
- 9 cm²
- 27 cm²
- 36 cm²
- 54 cm² (Correct answer)
Correct answer: 54 cm²
A cube has 6 equal square faces; surface area = 6 × s² = 6 × 3² = 6 × 9 = 54 cm².
Question 3: What are the coordinates of the origin on a coordinate plane?
- (1, 0)
- (0, 1)
- (0, 0) (Correct answer)
- (1, 1)
Correct answer: (0, 0)
The origin is the point where the x-axis and y-axis intersect, which is at coordinates (0, 0).
Question 4: How many lines of symmetry does a regular hexagon have?
- 3
- 4
- 6 (Correct answer)
- 8
Correct answer: 6
A regular hexagon has 6 lines of symmetry — 3 connecting opposite vertices and 3 connecting midpoints of opposite sides.
Question 5: What is the circumference of a circle with a diameter of 10 cm? (Use π ≈ 3.14)
- 31.4 cm (Correct answer)
- 62.8 cm
- 15.7 cm
- 78.5 cm
Correct answer: 31.4 cm
Circumference = π × diameter = 3.14 × 10 = 31.4 cm.
Question 6: Two lines that intersect and form 90° angles are called:
- Parallel lines
- Perpendicular lines (Correct answer)
- Skew lines
- Supplementary lines
Correct answer: Perpendicular lines
Perpendicular lines intersect at exactly 90° angles, which is indicated by a small square at the intersection point.
Question 7: What is the volume of a cylinder with a radius of 3 cm and a height of 7 cm? (Use π ≈ 3.14)
- 65.94 cm³
- 197.82 cm³ (Correct answer)
- 131.88 cm³
- 395.64 cm³
Correct answer: 197.82 cm³
Volume of a cylinder = πr²h = 3.14 × 3² × 7 = 3.14 × 9 × 7 = 197.82 cm³.
WI Forward Mathematics: Geometry and Measurement 2
What is the area of a triangle with a base of 10 cm and a height of 6 cm?