Question

The polygons are similar. Find the value of x.

2-
Р
X
X
20
21
14
5
Q 12 R
L
18
K

Answer 1

`\\ \rm\Rrightarrow (21)/(x)=(14)/(20)`

`\\ \rm\Rrightarrow (21)/(x)=(7)/(10)`

`\\ \rm\Rrightarrow 7x=210`

`\\ \rm\Rrightarrow x=30`

Answer 2

x = 30

Explanation:

12 : 20 = 18 : x

⇒ 12/20 = 18/x

⇒ 12x = 18 · 20

⇒ 12x = 360

⇒ x = 360 ÷ 12

⇒ x = 30