Not sure what ya got goin' there.....can yo clarify that a bit?
IF its a 9 x 9ft that equals 9 x 9 = 81 sq ft
IF the other one is a 6 x 9 that equals 6 x 9 = ? sq ft
OK?
~jc
We still need a diagram or description of the triangle....is it a RIGHT triangle? Isosceles? The square is 9x9 = 81 sq ft
If it is a RIGHT triangle, AND those are the LEG measurements (not the longest side-the hypoteneuse) then the area = 1/2 ( L x H) = 1/2 (9 x 6) = 27 sq ft (sometimes written as ft^2)
~jc