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

Answer:

$\text{C. }7.2$

Step-by-step 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:

$\frac{x}{12}=\frac{12}{20},\\20x=144,\\x=\frac{144}{20}=\boxed{\text{C. }7.2}$

Answer 2

Answer:

x = 7.2

Step-by-step explanation:

Look I did the math, okay?