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Geometry Formulas Practice Sheet

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Geometry Formulas Practice Sheet [#permalink] New post 26 Jul 2009, 09:36
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Hi all,

I created a template that gather all the geometry formulas that appear on the GMAT (if i missed any please tell!). I use it every week in order to ensure that I remember all of them.

I think it could be helpful for some of you so I decided to share.

The TEMPLATE is the one for practice.

Good luck!
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Re: Geometry Formulas Practice Sheet [#permalink] New post 26 Jul 2009, 19:33
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Great resource :!:

Thank you!

I have added this post to the Math Tips: new-to-the-math-forum-please-read-this-first-77764.html
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Re: Geometry Formulas Practice Sheet [#permalink] New post 07 Jan 2010, 08:47
Sorry, but on page 2 there is a misprint:
in Arc Measure (Intersecting Secants/Tangents) It must be the difference between arcs measures of AD and BD.
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Re: Geometry Formulas Practice Sheet [#permalink] New post 11 Sep 2010, 10:27
Now, what does this mean:

Area of Isosceles Triangle = 1/2[(leg)^2]
(from Geometry Formulas.pdf)

I haven't been able to give myself any convincing explanation of this formula...
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Last edited by rishabhsingla on 05 Oct 2010, 10:03, edited 1 time in total.
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Re: Geometry Formulas Practice Sheet [#permalink] New post 11 Sep 2010, 10:42
Expert's post
rishabhsingla wrote:
Now, what does this mean:

Area of Isosceles Triangle = 1/2[(leg)^2]
(from Geometry Formulas.pdf)

I haven't been able to give myself any convincing explanation of this formula...


Well that's because it's not true.

It should be area of isosceles right triangle = 1/2*(leg)^2, simply because area of right triangle equals to 1/2*leg1*leg2, and since in isosceles right triangle leg1=leg2, then this formula becomes area=1/2*(leg)^2.
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Re: Geometry Formulas Practice Sheet [#permalink] New post 20 Apr 2011, 18:47
Thanks for this memory sheet, very useful!


However I believe some formulas, details might be added...

Angles of a polygons (n-2)* 180, angles inscribed in a circle (compared to central angle there a section about it in the VERITAS Prep book)


Also I did not see two real IMPORTANT triangles sides ratio:

3:4:5
5:12:13

Good you put the formula for the equilateral triangle (which is not given in the OG and allow you to gain so much time)

I found formula I did not know! :-) Thank you for sharing
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Re: Geometry Formulas Practice Sheet [#permalink] New post 23 Apr 2011, 12:59
I'd also add one more element to Coordinate geometry. The coordinates of a point P on line joining two points A(x1,y1) and B(x2,y2) such that PA:PB is in the ration m:n would be ((mx2+nx1)/(m+n),(my2+ny1)/(m+n)).
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Re: Geometry Formulas Practice Sheet [#permalink] New post 04 Jan 2012, 06:33
Could anybody please rewrite and explain the formulas for arc measure( intersecting chords) and arc measure (intersecting secants/tangents)?
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Re: Geometry Formulas Practice Sheet [#permalink] New post 13 Nov 2012, 10:06
In the formula sheet.... Arc Measure (Intersecting Secants/Tangents) [2] formula shouldn't it be angle C = AD-BD/2 since C is external point.
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Re: Geometry Formulas Practice Sheet [#permalink] New post 23 Dec 2012, 06:45
Expert's post
Amateur wrote:
In the formula sheet.... Arc Measure (Intersecting Secants/Tangents) [2] formula shouldn't it be angle C = AD-BD/2 since C is external point.


Check here: geometry-formulas-practice-sheet-81427.html#p670925

Better resource on that is here: math-circles-87957.html
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NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


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Re: Geometry Formulas Practice Sheet [#permalink] New post 29 Jun 2014, 10:09
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Geometry Formulas Practice Sheet   [#permalink] 29 Jun 2014, 10:09
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