Question

What is the length of DC ?

2 units

3 units

6 units

9 units

Answer 1

3 units

Explanation:

The computation of the length of DC is shown below:

As we can see from the attached figure that the DE is parallel to BC with the help of basic proportionality theorem

Now the equation is

`(AE)/(EB) = (AD)/(DC)`

`(12)/(4) = (9)/(DC)`

DC × 12 = 9 × 4

DC × 12 = 36

So, DC

= 36 ÷ 12

DC = 3 units

Hence, the correct option is b. which determines the length of DC