Definition:Altitude of Triangle
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Let $\triangle ABC$ be a triangle.
The line $h_a$ so constructed is called the altitude of $\angle A$.
The point at which $h_a$ meets $BC$ is the foot of the altitude $h_a$.
Also defined as
Altitudes are a type of Definition:Cevian.
- 2014: Christopher Clapham and James Nicholson: The Concise Oxford Dictionary of Mathematics (5th ed.) ... (previous) ... (next): Entry: altitude