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the area of any triangle

We know we can find the area of any triangles using this formula:A = 1/2.b.hwhere b is the base of the triangle and h is the perpendicular height.

This rule works when we are given information about the base and perpendicular height of a triangle. But what if we are given different information? Have a look at this video: So, in general we can say that to find the area of a triangle given the sides and the angle between them, we can use: A = ½ absinC or A = ½ acsinB or A = ½ bcsinA

BBC Bitesize - Area of a Triangle

practice questions

Questions on Area, including sine and cosine rules

review notes:

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