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Math Help - Angles in a triangle.

  1. #1
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    Exclamation Angles in a triangle.

    1.Given a triangle ABC, where AC = BC. Point D lies on the side AB, where BD = 2, AD, and the angle BDC is 90 .
    Determine the angle BAC

    2. In a convex pentagon ABCDE with vertices of the angles B and D are simple. Prove that the perimeter of the triangle ACE is not less than 2BD.

    The tasks are edited by google translator, so sorry for linguistic confusion.
    Please do these tasks quickly and in detail.
    I rly,rly thx for all answers
    Last edited by mr fantastic; October 23rd 2011 at 11:32 AM. Reason: Merged posts, retitled.
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  2. #2
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    Re: Angles in a triangle.

    Quote Originally Posted by isel View Post
    1.Given a triangle ABC, where AC = BC. Point D lies on the side AB, where BD = 2, AD, and the angle BDC is 90 .
    Determine the angle BAC

    2. In a convex pentagon ABCDE with vertices of the angles B and D are simple. Prove that the perimeter of the triangle ACE is not less than 2BD.

    The tasks are edited by google translator, so sorry for linguistic confusion.
    Please do these tasks quickly and in detail.
    I rly,rly thx for all answers
    What is the rush? Where has this question come from? NB: MHF provides help, not retailed solutions.
    Follow Math Help Forum on Facebook and Google+

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