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March 25, 2017

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Find the surface area of a right octagonal pyramid with height 2.5 yards, and its base has apothem length 1.5 yards.

  • Math - ,

    Surface Area=Base Area+Lateral Area
    SA=BA+LA
    The side of the octagon
    a=2*apothem*tan(45/2)
    BA=0.5*8a*apothem=8*apothem^2*tan(45/2)
    LA=4a*(slant height)
    slant height=sqrt(height^2+apothem^2)

    tan(45/2)=0.4142

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