Answer
The length of the other two sides is less than or equal to 8 cm.
Work Step by Step
The perimeter is less than or equal to 24cm.
$p\leq24$ $\longrightarrow$ substitute the given lengths and let s be the unknown side
$2s+8\leq24$ $\longrightarrow$ subtract 8 from both sides
$2s+8-8\leq24-8$ $\longrightarrow$ simplify
$2s\leq16$ $\longrightarrow$ divide both sides by 2
$2s\div2\leq16\div2$ $\longrightarrow$ simplify
$s\leq8$
