Question: AD←→ is tangent to circle B at point C.

What is the measure of ∠BCA?

https://static.k12.com/nextgenmedia/assets/1077917-HSGMTL3S20403_quiz2.gif

Answer: 90º

Question: AD←→ is tangent to circle B at point C. The measure of ∠ABC is 40º.

What is the measure of ∠BAC?

https://static.k12.com/nextgenmedia/assets/1077917-HSGMTL3S20403_quiz2.gif

Answer: 50º

Question: What is the value of n?

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https://static.k12.com/nextgenmedia/assets/8095489-NGGMTDP024297_001.jpg

Answer: n = 14 cm

Question: What is the value of n?

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https://static.k12.com/nextgenmedia/assets/8095492-NGGMTDP024297_004.jpg

Answer: n = 5

Question: Which statement about BC←→ is correct?

https://static.k12.com/nextgenmedia/assets/1583237-IM21502274Q035Q.jpg

Answer: BC←→ is not a tangent line because m∠ABC≠90°.