The area of any triangle
Lesson 8 / 11
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I can derive the formula for the area of any triangle.
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The formula for the area of a right-angled triangle is 0.5 x base x perpendicular height
With an equilateral or isosceles triangle, you can use Pythagoras' theorem to find the height
If you know one of the base angles, you can use the sine ratio to find the perpendicular height
Doing this leads to the formula 0.5absinC
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