Will an altitude always lie in the interior of a triangle?
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No, the altitude of a triangle might lie outside the triangle. for example in the obtuse-angled triangle, we have to extend the base side for making altitude angle.
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No an altitude of any triangle won't always lie in the interior . As altitude is an segment through a vertex and a perpendicular to a line containing the base it is also the height of a triangle.
Reasoning : For an obtuse triangle the altitude is outside the triangle for this case the base is extended and then a perpendicular is drawn from opposite vertex to the base .
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