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28 December, 23:02

Regular triangular pyramid has the slant height k=12 cm and lateral area AL = 198 cm2. Find the length of the base edge.

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  1. 28 December, 23:14
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    If s represents the edge length of the base, the lateral area is given by

    A = (1/2) * (3s) * (k)

    We can substitute the given numbers and solve for s.

    198 cm² = (1/2) * (3s) * (12 cm)

    (198 cm²) / (18 cm) = s

    s = 11 cm

    The length of a base edge is 11 cm.
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