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Triangle Area Revision
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Triangle Area Revision
Use the formula: area = ½ × base × perpendicular height. Write area answers in square units, such as cm² or m².
Practise the formula
1.A triangle has a base of 11 cm and a perpendicular height of 6 cm. Calculate its area.
2.A triangular sail has a base of 9 m and a perpendicular height of 4 m. What is its area?
3.Match each base-and-height pair to the area it gives. Use square centimetres for every area.
- Base 8 cm, height 7 cm
- Base 12 cm, height 4 cm
- Base 10 cm, height 9 cm
- Base 6 cm, height 10 cm
- 45 cm²
- 24 cm²
- 28 cm²
- 30 cm²
4.What is the area of a triangle with a base of 18 cm and a perpendicular height of 5 cm?
- 23 cm²
- 45 cm²
- 90 cm²
- 46 cm²
Solve and explain
5.A triangular banner has a base of 16 cm and a perpendicular height of 13 cm. Work out its area.
6.A triangle-shaped garden has an area of 42 m² and a base of 12 m. Find its perpendicular height.
7.Draw any triangle in the space and label a base of 14 cm and its perpendicular height of 9 cm. Then calculate the triangle's area.
8.Compare two triangular panels. Panel A has a base of 20 cm and a perpendicular height of 7 cm. Panel B has a base of 14 cm and a perpendicular height of 11 cm. Which panel has the greater area, and by how much?
2 printable pages
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