Answer:
12 inches.
Explanation:
Length of a side of the base = 10 in.
1/2 length = 5.
s^2 = h^2 + 5^2 where s = slant height and h = height
13^2 = h^2 + 5^2
h^2 = 169 - 25 = 144
h = 12 in.
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