19.1 Perimeter and area of 2D shapes — Practise

1. Work out the perimeter of a rectangle with length 8 cm and width 3 cm.
2. Work out the area of a rectangle measuring 7 cm by 5 cm.
3. Work out the area of a triangle with base 10 cm and perpendicular height 6 cm.
4. A parallelogram has base 9 cm and perpendicular height 4 cm. Work out its area.
5. A trapezium has parallel sides 5 cm and 11 cm, with perpendicular height 4 cm. Work out its area.
6. A rectangle is 12 m long and 7 m wide. Work out its perimeter.
7. A compound shape is made from a 10 cm by 6 cm rectangle and a 4 cm by 3 cm rectangle joined without overlap. Work out its total area.
8. A triangle has area 42 cm² and base 12 cm. Work out its perpendicular height.