Question

What is the value of x in the diagram below? If necessary, round your answer

to the nearest tenth of a unit.
12
C
D
X
B
20
A. 20
B. 12.1
C. 7.2
D. 8

Answer 1

x = 7.2

Explanation:

Look I did the math, okay?

Answer 2

`\text{C. }7.2`

Explanation:

In the figure, all three triangles are similar. By definition, the corresponding sides of similar polygons must be in a constant proportion. Therefore, we can set up the following proportion to solve for
`x` by dividing corresponding sides:

`(x)/(12)=(12)/(20),\\20x=144,\\x=(144)/(20)=\boxed{\text{C. }7.2}`