Area of triangles and quadrilaterals

Worksheet: Area of triangles and quadrilaterals

Name:Class:

Answer the questions.

1. A triangle has base 10 cm and height 6 cm. What is its area?
   a) 16 cm²b) 30 cm²c) 36 cm²d) 60 cm²
2. A triangle has base 8 m and height 5 m. What is its area?
   a) 13 m²b) 20 m²c) 26 m²d) 40 m²
3. The area of a triangle is half of base × height.
   a) Trueb) False
4. A triangle has area 24 cm² and base 8 cm. What is its height?
   a) 12 cmb) 3 cmc) 6 cmd) 8 cm
5. A parallelogram has base 7 cm and perpendicular height 4 cm. What is its area?
   a) 11 cm²b) 14 cm²c) 22 cm²d) 28 cm²
6. To find a parallelogram's area, multiply the base by the slanted side length.
   a) Trueb) False
7. A parallelogram has area 45 m² and base 9 m. What is its perpendicular height?
   a) 10 mb) 36 mc) 405 md) 5 m
8. A trapezium has parallel sides 5 cm and 9 cm, and height 4 cm. What is its area?
   a) 18 cm²b) 28 cm²c) 45 cm²d) 56 cm²
9. A trapezium has parallel sides 6 m and 10 m and height 3 m. What is its area in m²?
10. An L-shape is a 6 cm by 4 cm rectangle joined to a 3 cm by 2 cm rectangle. Total area?
    a) 20 cm²b) 24 cm²c) 30 cm²d) 36 cm²
11. A 10 m by 10 m square has a 4 m by 3 m rectangle cut out. What area is left?
    a) 12 m²b) 86 m²c) 88 m²d) 93 m²
12. A rectangle 8 cm by 5 cm has a triangle of base 8 cm and height 5 cm removed. Area left?
13. Which unit is best for measuring the area of a classroom floor?
    a) cmb) kmc) md) m²
14. A square with sides of 1 m has an area of 100 cm².
    a) Trueb) False
15. How many square centimetres are in one square metre?
16. Which unit is best for the area of a postage stamp?
    a) cm²b) km²c) md) m²