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An altitude of a triangle is the perpendicular line drawn from the vertex of the triangle to the opposite side. The altitude of a triangle is also known as the height of the triangle.
In triangle ABC, AD is the altitude which is a perpendicular line drawn from the vertex A to the point D in the opposite side BC.
Important!
- The altitude makes a right angle with the base of a triangle. Here in ABC, AD is perpendicular to BC.
- As there are three possible vertices for any triangles, there will be three possible altitudes.
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