Plane Geometry! (1 Viewer)

jebbie

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Okay so I know no one can truly help me with Plane Geometry, either in real life or on this post, and yes I do have a tutor..

But I was wondering if there was an easy way to remember rules or such, I've /never/ understood it and I understand most if not all other aspects of maths pretty well but I dont want to fail because of plane geometry.
:( Please Help (Gosh I feel like Leeloo in fifth element :p)
 

haboozin

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hey,

i've never been good at plane geometry, i prefer circle geometry than plane... but you dont even need to worry about those!


but basicly, what i have found that... geometry needs practice... you will start seeing things automatically, as you practice more you are familiar with all sorts of situations and thus able to make correct judgment upon it..
By practice i mean alot, and ways of remembering... ummm practice haha.
Just spend like a whole day doing Q's and after every Question look at the answer and if you got it wrong, learn from the answer... adapt their way of solving the problem..
 

Kutay

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What i recommend to do is to write down all the ones you will be using like really just practice practice practice them only way i guess but yeh REALLY recommend writing them all down on a piece of cardboard so u can refer to them while u are working and go over them a fair bit and in time you should be able to remeber them, like anything it is practice, hope this can help!!
 

Jago

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is plane geo congruence, similarities, alternate angles, cointerior angles etc etc?

i really have no idea :p
 

Jago

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oh, those things aren't usually too bad. Just write down every angle you know, and look for the things i said above.

Congruence - SAS, AAS, SSS, RHS
similarity - 2 sides proportional, included angle equal
and all that other stuff.
 

jebbie

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Jago said:
oh, those things aren't usually too bad. Just write down every angle you know, and look for the things i said above.

Congruence - SAS, AAS, SSS, RHS
similarity - 2 sides proportional, included angle equal
and all that other stuff.

Thanks, I do try. Its usually all the other shapes I get confused with... But seriously who /cares/ whats the difference between a rhombus and a square?

Thanks so much you guys, I guess I just have to knuckle down and get in heaps of revision :( Lovely.
 

Jago

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the 2 unit hsc markers, that who. :p

i accelerated in 2u last year (88 hsc mark :mad:) and im doing it again this year so most of this stuff is pretty basic so far. I'm not as good as some of the other guys in here, but if you need help, just pm/msn me or just post it here :p

gl.
 

Trev

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jebbie said:
Thanks, I do try. Its usually all the other shapes I get confused with... But seriously who /cares/ whats the difference between a rhombus and a square?
Another question is, who knows what the difference is, I surely don't! :p
 

jebbie

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Trev said:
Another question is, who knows what the difference is, I surely don't! :p

I have no idea, I have attempted to 'study' those stupid shapes. Attempted being the key word, it just doesnt sink in :( Very stressing..

Whats the difference between a rhombus and a square? Well I can tell you - Theyre spelt different thats what! Another thing I can tell you is that if there is a significant amount of plane geometry in the HSC I will fail :(
 

Estel

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rofl
Plane geometry was taught in yr 8 , yr 9, yr 10, yr 11. Surely it sunk it at some stage? :p
Try doing an exercise from the textbook. That always helps people who face such overwhelming problems.
 

Ghost1788

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Hi , i reccomend you get a book called HSC MAths practice questions by topic. it has a variety of questions from the HSC course as well as formula tests that make sure you known the formulas for each topic as for remembering the details associated with plane geo there is no easy way but you should know

Tapezium - quadrilateral(quad) with 1 pair of || sides

Parallelogram - quad with 2 pairs of || sides
- opposite sides equal
- opposite angles equal
- diagonals bisect each other

Rhombus - refer to ||'gram
+
- all sides equal
- diagonals bisect at right angles
- diagonals equal

Rectangle - refer to ||'gram
+
- angles are right angles
- diagonals are equal

Square - combine rectangle and rhombus properties

there are more such as kite isos. triangle and equalateral triangle but you should know them i too lazy to put them up

there is also 4 cong. proofs
SAS - 2 sides + incl. angle
SSS - 3 corresponding equal sides
AAS - two corresponding angles and a corresponding side
RHS - right angle , hypontenuse and side

similar triangles can be proved by proving that corresponding angles are equal (note if two are equal then all are) also similar triangles can be proved by proving that corresponding sides are in the same ratio.

finally if parallel lines are cut by transversals('straight lines') the transversals are cut in equal ratios

ie/
---- = represents parallel lines
..... = used to space out characters, i wasnt sure how to format...just ignore them

....|....................\
---|------------------\----------
....|.a....................\...c
---|--------------------\--------
....|.b.......................\...d
---|----------------------\------
....|.............................\

a/b=c/d



hope i have helped.....

Ghost1788

EDIT: final suggestion try drawing the shapes and writing the proofs beside them almost all of them are related so if you know what a ||'gram is then it is simple to derive what is missing to get the remaining quadrilaterals
 
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jebbie

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Estel said:
rofl
Plane geometry was taught in yr 8 , yr 9, yr 10, yr 11. Surely it sunk it at some stage? :p
Try doing an exercise from the textbook. That always helps people who face such overwhelming problems.
Indeed thats what one would expect. However this is how it works.

Year8 - Ohmygosh I dont understand this crap - Hence a fail
Year9 - Ohmygosh I thought we had moved on from this, I still dont get it! - Fail
Year10 - What? Ive never done this before.. No wait, I remember not understanding this - Fail
etc

I JUST DONT GET IT!!!
 

jebbie

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Ghost1788 said:
Hi , i reccomend you get a book called HSC MAths practice questions by topic. it has a variety of questions from the HSC course as well as formula tests that make sure you known the formulas for each topic as for remembering the details associated with plane geo there is no easy way but you should know

Tapezium - quadrilateral(quad) with 1 pair of || sides

Parallelogram - quad with 2 pairs of || sides
- opposite sides equal
- opposite angles equal
- diagonals bisect each other

Rhombus - refer to ||'gram
+
- all sides equal
- diagonals bisect at right angles
- diagonals equal

Rectangle - refer to ||'gram
+
- angles are right angles
- diagonals are equal

Square - combine rectangle and rhombus properties

there are more such as kite isos. triangle and equalateral triangle but you should know them i too lazy to put them up

......



hope i have helped.....

Ghost1788

EDIT: final suggestion try drawing the shapes and writing the proofs beside them almost all of them are related so if you know what a ||'gram is then it is simple to derive what is missing to get the remaining quadrilaterals

Either:
(a)you were just looking at a textbook
(b)youre really good at this
(c)youre really this insane alien person who has photographic memory like my friend :(

Either way Im insanely jealous and feel extra stupid and feel even more motivated to go sleep instead of study :D
 

Ghost1788

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ahhh... well a bit of a) and b)

=)

used a) to make sure i giving the right info....
 

Jago

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You should get a better (personal) tutor.
 

jebbie

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Jago said:
You should get a better (personal) tutor.
I do. She's amazingly good, we go over Plane Geometry every lesson for a little while and I can actually remember stuff but I was wondering if there was some fabulous extra special magicaly easy way :D Anyway but the hardest way is the best!


Ghost1788 said:
ahhh... well a bit of a) and b)

=)

used a) to make sure i giving the right info....
And there I was thinking I was doomed, although I know there are people who could tell me absolutely ever detail about all those shapes and more :(

The more I think about Plane Gemetry the more I think either about sleeping or eating: I swear Im going to balloon 2 sizes by the end of this year :(
 

Ghost1788

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Jago said:
You should get a better (personal) tutor.
True that

i have found that if after a tuition lesson/session you still have problems which a topic you asked them , then the tutor is not working for you.

different people learn better with different teaching techniques so u may have to try a few tutors to determine which works, either way you need to find out what problems you have had in class before you talk to the tutor and you have to ask them how to do it.....tutors are not mind readers, however a good tutor/teacher will be able to see when they are explaining something to you that you do not understand and as such slow down...but u may still have to ask them to slow down when they are explaing the material to you....

there is abosolutely no need to know everything about everything in the course, from what i gather it is better to be able to prove and derive stuff about the course by making a little assuptions as possible however the long post i made earlier should be known as facts and very little is to be derived..sorry for not providing the magic formula.....

GOOD LUCK

Ghost1788
 
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jebbie

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I understand it all on a short term basis. Its trying to remember it once Im doing another topic. I think my longterm memory and plane geometry just aren't friends. Its really frustrating because I dont have this problem with any other area in maths. Anyways thanks alot everyone, I might actually go study now :D
 

console

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Anyone started app. of calculus yet?; If you need ne help jus gimmie a buzz....cos i know it can be :chainsaw: :chainsaw: :mad:

With geometry, relax. You gotta learn to feel it, embrace within. Just remember it how i always do; F for corresponding angles, Z for alternate angles n 4 cointerior logic prevails! :)
 

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