Geometry- proof -- Mathematics Help

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Subject: Geometry- proof

Author:
LV

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Date Posted: 14:21:25 06/03/04 Thu

Hello
I am needing help with a proof... actually just needing some guidance as to where to start! I have to prove the following in as many ways as possible: Given a triangle ABC with median AD, prove that 2((AB^2)+(AC^2))= BC^2 + 4(AD^2). I have proven this using analytic methods... and that will barely get me a passing mark. Any ideas?

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Replies:

[> Subject: Re: Geometry- proof
Author: mik [ Edit \| View ]	Date Posted: 16:26:28 11/18/05 Fri hi.. i am having trouble figuring out what iam trying to prove in this question: In triangle ABC, A(o,a) B(0,0) and C (b,c) , using hte analytic method, prove that the right bisectors of the sides meet at a common point. [ Post a Reply to This Message ]

[> [> Subject: Re: Geometry- proof

Author:
QUITTNER
[ Edit | View ]

Date Posted: 08:23:07 11/21/05 Mon

>>> In triangle ABC, A(o,a) B(0,0) and C (b,c) , using hte analytic method, prove that the right bisectors of the sides meet at a common point. <<<
..... A to B is a vertical line, C is further to the right.
..... Find the equation of the line AC, then the equation of its right-angled bisector.
.....Do the same with AB (a horizontal line). At which point does it meet the bisector line you found?
..... Then do the same with line BC. At which point does it meet the other 2? Prove that it is the SAME point.

[ Post a Reply to This Message ]

[> Subject: Re: Geometry- proof
Author: mik [ Edit \| View ]	Date Posted: 16:26:37 11/18/05 Fri hi.. i am having trouble figuring out what iam trying to prove in this question: In triangle ABC, A(o,a) B(0,0) and C (b,c) , using hte analytic method, prove that the right bisectors of the sides meet at a common point. [ Post a Reply to This Message ]

[> Subject: Re: Geometry- proof

Author:
Ladricka Brown
[ Edit | View ]

Date Posted: 12:41:22 02/12/06 Sun

>Hello
>I am needing help with a proof... actually just
>needing some guidance as to where to start! I have to
>prove the following in as many ways as possible: Given
>a triangle ABC with median AD, prove that
>2((AB^2)+(AC^2))= BC^2 + 4(AD^2). I have proven this
>using analytic methods... and that will barely get me
>a passing mark. Any ideas?

[ Post a Reply to This Message ]

[> Subject: Re: Geometry- proof
Author: Ladricka Brown [ Edit \| View ]	Date Posted: 12:44:52 02/12/06 Sun >Hello >I am needing help with finding numbers in 30-60-90 right triangle and a 45-45-90 triangle as well as angles of elevation and depression, think u could help me out? It would mean a great deal to me if u could help me out> Thanks, Ladricka Brown [ Post a Reply to This Message ]

[> [> Subject: Re: Geometry- proof
Author: Esperanza Arriaza [ Edit \| View ]	Date Posted: 19:59:16 02/16/06 Thu >>Hello >>I am needing help with finding numbers in 30-60-90 >right triangle and a 45-45-90 triangle as well as >angles of elevation and depression, think u could help >me out? It would mean a great deal to me if u could >help me out> > > Thanks, Ladricka Brown [ Post a Reply to This Message ]

[> [> Subject: Re: Geometry- proof
Author: Mohammed Adams (angles of elevation and depression) [ Edit \| View ]	Date Posted: 08:14:38 07/23/07 Mon i am having problem in solving a particular topic in mathematics and this topic include Angles of elevation and depression. Thanks,from Adams [ Post a Reply to This Message ]