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Area of a Triangle

Learn how to calculate the area of triangles using base and height. Let's get started! 🚀

Area of a Triangle - introduction visual

Video Lesson

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Flashcards

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Diagram explaining the area of triangles formula 1/2 x b x h, examples of perpendicular height, and notes emphasising any side as base.Illustration of finding the area of a triangle with a base of 6 cm and height of 5 cm using the formula 1/2 x base x height, resulting in 15 cm².The area question of a right-angled triangle with a base of 5 cm and height of 12 cm. Calculations demonstrate the area formula, yielding 30 cm².How to calculate the height of a triangle using its area, with given dimensions and a worked-out formula solution.

🛎️ What is the Area of a Triangle

  • The area of a triangle is given by: Area=12×base×heightArea = \frac{1}{2} \times base \times height
  • The height must be perpendic to the base.

🛎️ Finding the Area of a Triangle

  • If you know a base and its perpendicular height, you can find the area.
  • Multiply base × height, then divide by 2.

🛎️ Area of a Right-Angled Triangle

  • In a right-angled triangle, the two perpendicular sides are called the legs.
  • To find the area, multiply the legs, then divide by 2.

🛎️ Finding the Height from the Area

  • Use the same formula: Area=12×base×heightArea = \frac{1}{2} \times base \times height
  • Substitute the known values and solve for the missing height.

Practice Questions

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