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Mathematics 14 Online
OpenStudy (anonymous):

The vertices of DEF are D(7, 3), E(4, -3), and F(10, -3). Write a paragraph proof to prove that DEF is isosceles. Please help me!!

OpenStudy (anonymous):

in order to prove that the triangle is isosceles, find all the lengths of the sides and show that only two sides are of equal length

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