The Ratio of Similarity: Calculate The Missing Side based on the formula

What is the ratio between sides AB and BD?

4

Triangles CED and ABC are similar.

Choose the correct equation for calculating X.

$x+4=12$

Triangles DEF and ABC are similar.

What is the length of side DF?

10

Triangles FED and ACB are similar.

Calculate the length of X.

12

The triangles KNR and DFE are similar.

What is the value of X?

$6$

Triangles KRA and ENB are similar.

What is the length of side RA?

8

What is the length of side DB equal to?

33

Triangles ABE and ADC are similar.

AC = 5

Calculate X and Y.

X=2.1 , Y=4.5

Calculate the length of side CD.

5

AB is parallel to DE.

Calculate $a\times b$.

15

What is the length of side AE equivalent to?

159

Triangles EBN and KAR are similar.

Which of the equations is correct for calculating the length of AR and EN?

$x+6=4x$