Question

the figures are similar. find the missing side and enter in the pink box.
81
36
54
?
20
30

Explanation:

Step1: Set up proportion

Since the figures are similar, the ratios of corresponding sides are equal. Let the missing side be \(x\). We have the proportion \(\frac{54}{20}=\frac{81}{x}\).

Step2: Cross - multiply

Cross - multiplying gives \(54x = 20\times81\).

Step3: Solve for \(x\)

First, calculate \(20\times81 = 1620\). Then \(x=\frac{1620}{54}\). Simplifying, \(x = 30\).

Answer:

\(30\)