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Mathematics

Regular triangular pyramid has 6 cm long base edge and slant height k=9 cm. Find the lateral area of the pyramid.

and

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. the area is three triangles, each with base 6 and height 9.
    Recall that the area of a triangle is A = 1/2 bh

    and

    same problem, only this time, solve for b

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    oobleck
  2. 81 cm

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  3. thanks isabella

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  4. no problemo

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