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# Geometry Formulas Practice Sheet

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Joined: 13 Jul 2009
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26 Jul 2009, 10:36
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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!
Attachments

Geometry Formulas_template.pdf [44.28 KiB]

Geometry Formulas.pdf [72.21 KiB]

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Re: Geometry Formulas Practice Sheet [#permalink]

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26 Jul 2009, 20:33
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Great resource

Thank you!

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Re: Geometry Formulas Practice Sheet [#permalink]

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07 Jan 2010, 09:47
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]

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11 Sep 2010, 11:27
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...

Last edited by rishabhsingla on 05 Oct 2010, 11:03, edited 1 time in total.
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Re: Geometry Formulas Practice Sheet [#permalink]

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11 Sep 2010, 11:42
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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]

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20 Apr 2011, 19:47
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]

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23 Apr 2011, 13:59
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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Rahul

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Re: Geometry Formulas Practice Sheet [#permalink]

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04 Jan 2012, 07:33
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]

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13 Nov 2012, 11:06
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]

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23 Dec 2012, 07:45
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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Re: Geometry Formulas Practice Sheet [#permalink]

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29 Jun 2014, 11:09
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Re: Geometry Formulas Practice Sheet [#permalink]

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25 Jan 2016, 20:29
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Re: Geometry Formulas Practice Sheet [#permalink]

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28 Mar 2017, 06:17
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] 28 Mar 2017, 06:17
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