Work through the levels in order. Type your answer and press Check — open the worked solution if you get stuck. Answers like -6, 3/4 or 0.25 are typed exactly as shown.
Level 1 · Warm-up
1 Find the perimeter of a rectangle 9 cm by 4 cm. (cm)
Show worked solution
2(9 + 4) = 26 cm.
2 Find the area of a rectangle 9 cm by 4 cm. (number of cm2)
Show worked solution
9 × 4 = 36 cm2.
3 Find the area of a square with side 7 cm. (number of cm2)
Show worked solution
7 × 7 = 49 cm2.
Level 2 · Core
4 Find the area of a triangle with base 8 cm and perpendicular height 5 cm. (number of cm2)
Show worked solution
½ × 8 × 5 = 20 cm2.
5 Find the area of a parallelogram with base 9 cm and perpendicular height 4 cm. (number of cm2)
Show worked solution
9 × 4 = 36 cm2.
6 Find the perimeter of a rectangle 12 cm by 7 cm. (cm)
Show worked solution
38 cm.
Level 3 · Challenge
7 A trapezium has parallel sides 6 cm and 10 cm and height 5 cm. Find its area. (number of cm2)
Show worked solution
½(16) × 5 = 40 cm2.
8 A rectangle has area 45 cm2 and length 9 cm. Find its width. (cm)
Show worked solution
45 ÷ 9 = 5 cm.
9 How many cm2 are in 1 m2?
Show worked solution
100 × 100 = 10000 cm2.