Chownie12
9

# Find the missing dimension of each figure Parallelogram: h= 5 1/4 ft; a= 12 ft 2

The area of a parallelogram can be found using the formula $A=bh$. We know that $A=12$ and $h=5\frac{1}4$, so we can divide 12 by 5¼ to get b. Let's put 5¼ as an improper fraction to make dividing easier. 5 wholes = 20 fourths. 20 + 1 = 21 fourths. Dividing by a fraction is the same thing as multiplying by its reciprocal. To find the reciprocal we flip the numerator and the denominator and get 4/21. 4/21 × 12 = 48/21 which as a simplified mixed number is $\boxed{2\frac{2}7\ ft}$