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Math Help - tangents problem....

  1. #1
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    tangents problem....

    In the given figure PA and PB are tangents. XY is also a tangent. Prove that:-
    i) 2AP= perimeter of triangle PCD.
    ii) If, AP=12cm, find the perimeter of triangle PCD.
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  2. #2
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    Quote Originally Posted by snigdha View Post
    In the given figure PA and PB are tangents. XY is also a tangent. Prove that:-
    i) 2AP= perimeter of triangle PCD.
    ii) If, AP=12cm, find the perimeter of triangle PCD.
    hi

    if 2 tangents are drawn from an external points to a circle , then the tangents are equal in length .

    so AC=CE=w , BD=DE=x , PA=PB=y

    PC=PA-AC=y-w , PD=PB-BD=y-x

    the perimeter of the triangle would be y-w+y-x+w+x=2y

    AP=y , so twice of it would be ...
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