Question

Find the perimeter of the

similar figure.
10cm
12cm
Perimeter = 25cm
Perimeter = [?]cm

Answer 1

30 cm

Explanation:

The ratio of the sides and ratio of perimeter of similar figures are equal.

Ratio of sides = 10 : 12 = 5 : 6 ( in simplest form )

let perimeter of larger figure be x, then by proportion

`(5)/(25)` =
`(6)/(x)` ( cross- multiply )

5x = 150 ( divide both sides by 5 )

x = 30