Math 1 Quiz
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GEOMETRY
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In a coordinate proof showing that triangle PQRPQR is isosceles, Jake calculates ∣PQ∣=(x2−x1)2+(y2−y1)2=5|PQ| = \sqrt{(x_2-x_1)^2 + (y_2-y_1)^2} = 5 and ∣PR∣=(x3−x1)2+(y3−y1)2=5|PR| = \sqrt{(x_3-x_1)^2 + (y_3-y_1)^2} = 5. His teacher asks him to explain the geometric significance of this algebraic result. Which response best connects the algebra to the geometry?
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