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October 16, 2025, 02:09:58 pm
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Author Topic: Which Vector Proofs do we actually need to know?  (Read 5255 times)  Share 

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Martoman

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Re: Which Vector Proofs do we actually need to know?
« Reply #15 on: October 26, 2010, 10:45:56 pm »
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Quote from: itolduso on October 26, 2010, 07:07:29 pm
how do you prove the altitudes of any triangle are concurrent?

That is a very hard question
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theuncle

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Re: Which Vector Proofs do we actually need to know?
« Reply #16 on: October 27, 2010, 10:08:57 am »
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given , and
and and if it can be shown that then it's proved!



hence,


sorry i suck at latex but you get the picture!
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googoo

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Re: Which Vector Proofs do we actually need to know?
« Reply #17 on: October 27, 2010, 01:24:43 pm »
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thanks, clever methods

now how do you prove the medians of any triangle are concurrent?
this is in the study design
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tram

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Re: Which Vector Proofs do we actually need to know?
« Reply #18 on: October 27, 2010, 04:33:39 pm »
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wahhhhhhh it's in the study design???
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Martoman

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Re: Which Vector Proofs do we actually need to know?
« Reply #19 on: October 27, 2010, 06:20:55 pm »
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itolduso

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Re: Which Vector Proofs do we actually need to know?
« Reply #20 on: October 27, 2010, 07:07:46 pm »
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are perpendicular bisectors of the sides of a triangle concurrent?
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Martoman

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Re: Which Vector Proofs do we actually need to know?
« Reply #21 on: October 27, 2010, 07:11:43 pm »
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if you have two or more perp bisectors it must be an equilateral triangle. I'd think then they would be.
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itolduso

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Re: Which Vector Proofs do we actually need to know?
« Reply #22 on: October 27, 2010, 07:13:52 pm »
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Quote from: Martoman on October 27, 2010, 07:11:43 pm
if you have two or more perp bisectors it must be an equilateral triangle. I'd think then they would be.

??
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Martoman

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Re: Which Vector Proofs do we actually need to know?
« Reply #23 on: October 27, 2010, 07:22:26 pm »
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Shouldn't they? If you have one perp bisector you have a isosoles. If you have two then all sides are equal.
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itolduso

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Re: Which Vector Proofs do we actually need to know?
« Reply #24 on: October 27, 2010, 07:29:24 pm »
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do you know what a perp bisector is
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Martoman

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Re: Which Vector Proofs do we actually need to know?
« Reply #25 on: October 27, 2010, 07:44:06 pm »
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Yeah. Line produced from one vertex and hitting the other side at a right angle and splitting that side length into the ratio 1:1  8-)
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itolduso

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Re: Which Vector Proofs do we actually need to know?
« Reply #26 on: October 27, 2010, 07:54:28 pm »
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Quote from: Martoman on October 27, 2010, 07:22:26 pm
Shouldn't they? If you have one perp bisector you have a isosoles. If you have two then all sides are equal.

now i understand what you are saying. a perp bisector of a side of a triangle does not necess. start from the opposite vertex.
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Elnino_Gerrard

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Re: Which Vector Proofs do we actually need to know?
« Reply #27 on: October 28, 2010, 08:24:13 pm »
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So for a square, i dint quite understand what we have to prove. could someone please explain? :(
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jasoN-

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Re: Which Vector Proofs do we actually need to know?
« Reply #28 on: October 28, 2010, 08:25:20 pm »
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diagonals are perpendicular, adjacent sides have same magnitude
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TrueTears

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Re: Which Vector Proofs do we actually need to know?
« Reply #29 on: October 28, 2010, 08:26:53 pm »
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Quote from: Elnino_Gerrard on October 28, 2010, 08:24:13 pm
So for a square, i dint quite understand what we have to prove. could someone please explain? :(
http://vcenotes.com/forum/index.php/topic,17229.msg176466.html#msg176466
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