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8 March, 06:55

how do I find the surface area of a square pyramid if the length is 11mm and the slant height is 13mm?

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  1. 8 March, 10:49
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    407mm²

    Step-by-step explanation:

    the triangle face is 1/2 (11) (13) = 71.5

    there are 4 triangle faces so 71.5 x 4 = 286

    plus the bottom, 11 * 11 = 121

    286+121=407mm²
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