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Triangle ABC has sides AB = 8, BC = 7, and AC = 9. The segments AB and AC...............What is the radius of circle O?

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Triangle ABC has sides AB = 8, BC = 7, and AC = 9.
The segments AB and AC are extended and a circle O is constructed exterior to the triangle and is tangent to BC at D and the extended lines through AC and AB at N and M, as shown.
What is the radius of circle O?
enter image description here

posted Mar 4, 2022 by Sidharth Malhotra

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