Question

BC is tangent to circle A at B and to circle D at C. What is AD to the nearest tenth?

18.7
19.3
18.1
21.6

Answer 1

@Directrix

Answer 2

A radius of a circle drawn at its outer endpoint to a tangent of the circle is perpendicular to the tangent. So, we begin with two right angles.

Answer 3

is it c

Answer 4

From point D, draw a perpendicular to radius AB.

Answer 5

Draw auxiliary lines as shown in the attached schematic.
Then, solve this equation using the Pythagorean theorem.

(AD)^2 = 2^2 + 18^2

Answer 6

(AD)^2 = 2^2 + 18^2
(AD)^2 = 4 + 324

What is AD @Saylilbaby

Answer 7

>is it c

If that is 18.1, then yes.

Answer 8

Question?