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  • ?
    Lv 6
    10 years ago
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    1. d, except that in II it should be CDA, not ADC, if one want to be careful about matching the vertices.

    2. b

    3.

    A. ∠WRS = ∠STW -- Given

    B. ∠RSW = ∠TWS -- Given

    C. SW = WS -- Same segment

    D. ∆RSW ≅ ∆TWS -- AAS Test

    E. RS ≅ TW -- From D.

    F. RS || TW -- From B.

    G. RSTW is a ▱ -- From E., F.

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