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#1 2015-06-08 12:04:21
- championmathgirl
- Member
- Registered: 2015-06-01
- Posts: 20
Tangent Triangle Proofs
Let the incircle of triangle
be tangent to sides , , and at , , and , respectively. Prove that triangle is acute.
, I'm new to this forum, I don't know whether the diagram came out.
I got a hint saying to compute the angles of triangle
in terms of the angles of triangle , but after doing so, got me nowhere.If I could get some help, that would be great!
Girls can be just as good as boys at math. We just need to get the same encouragement.
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#2 2015-06-08 19:20:17
- Bob
- Administrator
- Registered: 2010-06-20
- Posts: 10,621
Re: Tangent Triangle Proofs
hi championmathgirl
I'm not seeing that diagram but I have seen the problem before. Answer here:
http://www.mathisfunforum.com/viewtopic.php?id=20456
To post diagrams I use imgur.com
I upload the picture, and then copy the linked BCCode into my post.
Bob
Children are not defined by school ...........The Fonz
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you! …………….Bob 
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#3 2015-06-09 10:41:46
- championmathgirl
- Member
- Registered: 2015-06-01
- Posts: 20
Re: Tangent Triangle Proofs
Is there a way to see if someone else has posted the same problem, so there are not multiple problems, that are the same, being posted?
Girls can be just as good as boys at math. We just need to get the same encouragement.
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#4 2015-06-09 12:36:08
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Tangent Triangle Proofs
You can try the search function.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#5 2015-06-09 20:34:18
Re: Tangent Triangle Proofs
How can I be a champiomathgirl?
'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.
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#6 2015-06-09 20:36:19
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Tangent Triangle Proofs
Solve the NOHOW problem.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#7 2015-06-09 20:37:54
Re: Tangent Triangle Proofs
I don't have it.
'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.
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#8 2015-06-09 20:40:26
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Tangent Triangle Proofs
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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