If the length of a lateral edge of a right square pyramid is 13 mm and a side of the base is 10mm, then the?

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If the length of a lateral edge of a right square pyramid is 13 mm and a side of the base is 10mm, then the?

then the slant height is 12 mm. I know the answer is 12 mm, but I am confused on how to arrive to the answer.

SA = A + 1/2 P S???

When I use this formula, then I end up with 120S

2007-10-07 13:39:24 · 1 answers · asked by Jen 4 in Science & Mathematics ➔ Mathematics

1 answers

Pythagoras theorem!

√(13² - 5²) = 12

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2007-10-07 13:52:12 · answer #1 · answered by oregfiu 7 · 0⤊ 0⤋