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The 'slant height' of a regular pyramid is best described as the:
Answer & Solution
Correct answer: C.
1. The lateral edge runs from a base vertex to the apex; that is not the slant height.
2. The perpendicular from the apex to the centre of the base is the pyramid's height, not the slant height.
3. The slant height is the altitude of one triangular face, drawn from the midpoint of a base edge to the apex.
4. In a regular pyramid all such face altitudes are equal.
5. Hence slant height is the height of a lateral face.
_Source: SCERT Kerala Std X Mathematics Part-2, Chapter 7-8 (pp 180-199, 2019 ed.)._
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