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Mathematics 11 Online
OpenStudy (anonymous):

39. For a coordinate proof concerning an isosceles triangle, which coordinates might be easiest to use? A (0, 0), (2a, 0), (a, b) B (0, 0), (a, b), (2a, 2b) C (a, a), (b, b), (c, c) D (a, b), (c, d), (e, f)

OpenStudy (anonymous):

answer a is the only one which guarantees an isosceles triangle|dw:1393221336584:dw|

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