# Geometry Forum

Geometry Help Forum: Euclidean, basic geometric proofs, volumes, perimeters

1. ### Length of a 3D arc on a 2D surface which has been extruded from another arc?

• Replies: 2
• Views: 600
May 18th 2012, 06:18 PM
2. ### Triangle area problem

• Replies: 2
• Views: 763
May 16th 2012, 10:21 AM
3. ### What kind of 3D object is this/what is it's parameterisation?

• Replies: 3
• Views: 914
May 16th 2012, 05:28 AM
4. ### 360 degrees, not 390

• Replies: 3
• Views: 880
May 14th 2012, 09:45 PM
5. ### Area of Figures and Similar Figures

• Replies: 2
• Views: 532
May 10th 2012, 09:08 AM
6. ### proof

• Replies: 5
• Views: 667
May 10th 2012, 08:33 AM

• Replies: 0
• Views: 410
May 9th 2012, 12:57 PM
8. ### Isosceles pizza...

• Replies: 3
• Views: 1,199
May 7th 2012, 03:24 PM
9. ### Triangles help

• Replies: 3
• Views: 867
May 3rd 2012, 09:01 PM
10. ### Prove the perpendicular bisector of a chord passes through center

• Replies: 7
• Views: 5,876
May 3rd 2012, 05:19 PM
11. ### Perpendicular Vector Resolute

• Replies: 3
• Views: 847
May 3rd 2012, 10:21 AM
12. ### Secrets of the Ancient Egyptians

• Replies: 0
• Views: 601
May 2nd 2012, 08:09 AM
13. ### Proof: line segments joining midpoints of opposite sides of quadrilateral bisect

• Replies: 3
• Views: 21,331
May 1st 2012, 01:59 PM
14. ### Geometric Proofs

• Replies: 1
• Views: 6,265
Apr 29th 2012, 12:31 PM
15. ### Expression for Distance between two lines

• Replies: 2
• Views: 745
Apr 27th 2012, 02:17 PM
16. ### embedding of of two closed intervals in R^3 give embeddding of circle wrapped twice??

• Replies: 1
• Views: 691
Apr 26th 2012, 08:11 AM
17. ### Proof of Mercator’s deduction of logarithms from a hyperbola functions

• Replies: 9
• Views: 1,224
Apr 26th 2012, 06:39 AM
18. ### Name for generalized quadtree or octree?

• Replies: 0
• Views: 531
Apr 24th 2012, 12:34 AM
19. ### ray vs swept sphere intersection

• Replies: 0
• Views: 723
Apr 23rd 2012, 05:11 AM
20. ### Take Home Test.

• Replies: 2
• Views: 1,151
Apr 22nd 2012, 04:22 PM

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### cosx= .4583?

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