Covers Lessons 1–7: Units, conversions, perimeter and area of rectangles, triangles and parallelograms.
Question 9 3 marks
(a) Convert 2.4 km to metres. 1 mark
(b) Convert 350 cm to metres. 1 mark
(c) Convert 5 m² to cm². 1 mark
(a) 2.4 × 1000 = 2400 m [1]
(b) 350 ÷ 100 = 3.5 m [1]
(c) 5 × 10 000 = 50 000 cm² [1]
Question 10 3 marks
A rectangle has length 12 cm and width 7 cm.
(a) Find its perimeter. 1 mark
(b) Find its area. 1 mark
(c) A square has the same perimeter. Find its side length. 1 mark
(a) P = 2(12 + 7) = 38 cm [1]
(b) A = 12 × 7 = 84 cm² [1]
(c) Side = 38 ÷ 4 = 9.5 cm [1]
Question 11 4 marks
(a) Find the area of a triangle with base 15 cm and height 8 cm. 2 marks
(b) Find the area of a parallelogram with base 10 m and perpendicular height 6 m. 2 marks
(a) A = (15 × 8) ÷ 2 = 60 cm² [2]
(b) A = 10 × 6 = 60 m² [2]