Question

if these two shapes are similar, what is the measure of the missing length s? 39 ft 12 ft 4 ft s s = square feet submit

Explanation:

Step1: Set up similarity proportion

$\frac{4}{s} = \frac{12}{39}$

Step2: Cross-multiply to solve for s

$12s = 4 \times 39$

Step3: Calculate right-hand side

$12s = 156$

Step4: Isolate s by division

$s = \frac{156}{12}$

Answer:

13 feet