Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

- Index
- » Help Me !
- »
**Proof Help**

Pages: **1**

**helpmewithproofs****Member**- Registered: 2013-08-15
- Posts: 7

Can someone please help me do a 2 column proof similar to the one below with the given Triangle?

Photo of Triangle: http://i1039.photobucket.com/albums/a477/tricnetworks/IMG_11451.jpg

2 column proof as an example: http://www.wyzant.com/Images/Help/theorem_pf3.gif

*Last edited by helpmewithproofs (2013-08-19 02:56:26)*

Offline

In ΔDEG and ΔFEG

1. Angle DEG = Angle FEG [EG bisects DEF]

2. Angle EDG = Angle EFG

3. EG is common.

Thus, ΔDEG congruent to ΔFEG ⇒DG = FG ⇒ΔDFG is isosceeles

'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.

Offline

**helpmewithproofs****Member**- Registered: 2013-08-15
- Posts: 7

How would you put that in a 2 Colum proof with statements - reasons ?

Thanks for the help

Offline

What is a a two column proof?

'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.

Offline

**helpmewithproofs****Member**- Registered: 2013-08-15
- Posts: 7

It is a normal proof but has 2 columns you have to fill out. One column is the statements and one column is the reasons

Offline

**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,228

hi helpmewithproofs

Welcome to the forum.

How would you put that in a 2 Colum proof with statements - reasons ?

post 2 has most of what you need.

You could throw in the word 'given' for statements that were given in the problem, and the congruency reason is angle/angle/side.

So the only other things you need are a piece of paper, a ruler to draw the columns and a pencil

Good luck with it.

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

Offline

**helpmewithproofs****Member**- Registered: 2013-08-15
- Posts: 7

Thank your for your responses, but putting it into the 2 column format is still not making sense to me. Can someone please clarify that portion?

Offline

**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,228

Answered in other thread.

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

Offline

Pages: **1**

- Index
- » Help Me !
- »
**Proof Help**