Question

In the figure, what is the length of the tangent from the external point D to point B?

A. 2
B. 4
C. 7
D. 5

Answer 1

The answer is B) 4 all you have to do is count

Answer 2

The length of the tangent from point D to point B can be calculated by adding the length of BC to the length of BD.

We are given that:
BC = 2 units
CD = 2 units

Therefore:
BD = BC + CD
BD = 2 + 2 
BD = 4 units