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Let A = (2, 9), B = (6, 2), and C = (10, 10). Verify that...

Let A = (2, 9), B = (6, 2), and C = (10, 10). Verify that segments AB and AC have the same length. Measure angles ABC and ACB. On the basis of your work, propose a general statement that applies to any triangle that has two sides of equal length. Prove your assertion, which might be called the Isosceles-Triangle Theorem.

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