if BC = 9, AB = 6, and AC = 15, is BC tangent to Circle A?

Answer:no
Step-by-step explanation:
because to make BC a tangent, it would have to be perpendicular to BA. so triangle ABC would have to be a right triangle. For this we can use the Pythagorean theorem.
117 does not equal 225, so therefor is is not a right triangle, nor perpendicular