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Geometry Formulas Practice Sheet [#permalink]
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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!
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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! I have added this post to the Math Tips: newtothemathforumpleasereadthisfirst77764.html
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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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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 (n2)* 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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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 = ADBD/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

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Re: Geometry Formulas Practice Sheet [#permalink]
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