gấp lắm, giúp t vss

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gấp lắm, giúp t vss

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  1. RickyZenly
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    2024-02-04T14:37:48+00:00

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    Giải thích các bước giải:

    a.Xét $\Delta MBK,\Delta AMC$ có:

    $MK=MC$

    $\widehat{BMK}=\widehat{AMC}$

    $MB=MA$

    $\to \Delta MBK=\Delta MAC(c.g.c)$

    $\to \widehat{MBK}=\widehat{MAC}=90^o$

    $\to AB\perp BK$

    b.Xét $\Delta MAK,\Delta MBC$ có:

    $MA=BM$

    $\widehat{AMK}=\widehat{BMC}$

    $MK=MC$

    $\to \Delta AMK=\Delta BMC(c.g.c)$

    $\to \widehat{MAK}=\widehat{MBC}$

    $\to AK//BC$

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