> In the diagram below, AC = 4, AB = 6 and BC = 8. Is segment AB tangent to OC.

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Answer:
No
Step-by-step explanation:
The ratios of triangle side lengths are ...
4 : 6 : 8 = 2 : 3 : 4
This is an arithmetic progression.
The only arithmetic progression of side lengths that makes a right triangle is ...
3 : 4 : 5
The triangle is not a right triangle, so AB is not a tangent.