Question 1127212
What we know: 
we have 2 identical triangles
their combined areas are 1296in^2
the height of each triangle is 24
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2B x 2H = 1296
2B x 2(24) = 1296
2B x 48 = 1296
2B = 27
B = 13.5
Check:
2B x 2H = 1296
2(13.5) x 2(24) = 1296
27 x 48 = 1296 Correct