# Thread: URGENT! need help with proofs

1. ## URGENT! need help with proofs

hi all, i'm in need of some help. i take geometry honors at my high school and we have been doing proofs for about 3 weeks now. last week i was recieving an A in the class and i felt i knew the material but then i took the first test and failed and am now receiving a C. This is not normal for me as i am an A-B student. I DON'T GET C's hahahaha. ANYWAY...i apparently need help with proofs. I pretty much get what my teacher is saying when he's at the board teaching it to the class but as soon as he sits down i become confused. My major questions are:
1. Where do i start? (i know i write the givens but then what?)
2. Do the givens always come first?(in the book some are spread out)
3. HOW MANY STEPS ARE SUPPOSED TO BE IN A PROOF!!!(this is one of my major problems. I don't know how many steps are supposed to be in my proofs. It seems like one day we were writing 2 step proofs and the next day it turned into 5+ steps)
4. What do i look for when finding other steps for the proofs? (i dont know if i explained that right.)
5. HOW DO I COME UP WITH MY OWN CONCLUSION?(another major. It seems like i can come up with atleast 2 conclusions on every proof. Which one is correct?)
6. theres a few more that i can't really think of right now.
I would GREATLY appreciate ANYONE who knows proofs' help. I am taking a quiz on monday and i will most likely be studying and relearning everything this weekend. ANY HELP WILL HELP ME A TON!!!!!!!

THANX!!!!!!!!!!!!

2. Originally Posted by yllwsnow92
hi all, i'm in need of some help. i take geometry honors at my high school and we have been doing proofs for about 3 weeks now. last week i was recieving an A in the class and i felt i knew the material but then i took the first test and failed and am now receiving a C. This is not normal for me as i am an A-B student. I DON'T GET C's hahahaha. ANYWAY...i apparently need help with proofs. I pretty much get what my teacher is saying when he's at the board teaching it to the class but as soon as he sits down i become confused. My major questions are:
1. Where do i start? (i know i write the givens but then what?)
2. Do the givens always come first?(in the book some are spread out)
3. HOW MANY STEPS ARE SUPPOSED TO BE IN A PROOF!!!(this is one of my major problems. I don't know how many steps are supposed to be in my proofs. It seems like one day we were writing 2 step proofs and the next day it turned into 5+ steps)
4. What do i look for when finding other steps for the proofs? (i dont know if i explained that right.)
5. HOW DO I COME UP WITH MY OWN CONCLUSION?(another major. It seems like i can come up with atleast 2 conclusions on every proof. Which one is correct?)
6. theres a few more that i can't really think of right now.
I would GREATLY appreciate ANYONE who knows proofs' help. I am taking a quiz on monday and i will most likely be studying and relearning everything this weekend. ANY HELP WILL HELP ME A TON!!!!!!!

THANX!!!!!!!!!!!!
You seem to be making too big a thing of PROOFS, a proof is an argument or
demonstration that what is to be proved follows from the premises.

You should try to start by stating the premises, and what you are going to
show.

You should finish by observing that what you have just done demonstrates
what was to be shown is in fact true.

How you get from the start to the finish is up to you, in a formal proof
environment you will have a strict structure and a set of rules for moving
from one line to the next. But most proofs are not like that, they are less
formal. In an informal proof you are at liberty to use anything that comes to
hand (as long as it is well established or already proven) and follow the
normal rules of reasoning.

RonL

3. Most proofs (such as proof by deduction) are very flexible. As long as you obey the laws of logic, you'll be fine. However, some proofs such as induction obey stricter rules.

If you like, just work through a problem as you normally would, to try and prove the problem. Then try to trace your thought processes through from the start to the finish. A proof is like writing down the processes you used to solve the problem; writing down your thought process. Just make sure every step is justified.

Writing a proof is a lot like writing an essay. There are many ways you can write it, but as long as you include the necessary points and evidence, you will get full marks. Shorter proofs are usually 'more elegant' than longer proofs, but longer proofs are more rigorous. It's up to you.