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Incentre of the triangle with vertices A(0, 2, 1), B(-2, 0, 0), C(-2, 0, 2)

The same question, asked 2 times: 4 May 2023 S2, 13 May 2024 S2. Every wording below, oldest first.

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  1. Question 1

    4 May 2023 S2

    111
    The incentre of the triangle ABC, whose vertices are A(0,2,1),B(−2,0,0)A(0,2,1), B(-2,0,0) and C(−2,0,2)C(-2,0,2) is

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  2. Question 2

    13 May 2024 S2

    136
    The incentre of the triangle ABC, whose vertices are A(0,2,1),B(−2,0,0)A(0,2,1), B(-2,0,0) and C(−2,0,2)C(-2,0,2), is

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