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area = 1/2 x base x height

The base of the triangle is any side (usually one horizontal at the bottom) and the height is the shortest distance from this side to the opposite vertex.

The shortest distance is when a line drawn from the vertex meets the side at 90o (the perpendicular distance).

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13y ago

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There are different formulae depending on what information is given: base and height, two sides and an angle, three sides etc.

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13y ago
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Q: Formula of area of triangle
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