# Geometry Forum

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

1. ### 3D Rotation Rotational Constrain Equation

• Replies: 0
• Views: 383
Jun 5th 2010, 08:13 AM
2. ### Coordinate Geometry

• Replies: 1
• Views: 682
Jun 5th 2010, 04:21 AM
3. ### Vectors question

• Replies: 1
• Views: 383
Jun 5th 2010, 03:00 AM
4. ### Reflection matrice

• Replies: 0
• Views: 469
Jun 4th 2010, 11:39 PM
5. ### Circumference

• Replies: 4
• Views: 860
Jun 4th 2010, 12:25 PM
6. ### Angle in a tetrahedron

• Replies: 2
• Views: 3,225
Jun 4th 2010, 09:34 AM
7. ### A equation of a quintic curve with 6 or at least 5 double points

• Replies: 7
• Views: 859
Jun 4th 2010, 08:28 AM
8. ### distance between a pt. to sphere

• Replies: 1
• Views: 552
Jun 4th 2010, 08:07 AM
9. ### Which figure shows the original figure rotated counterclockwise 3/4 turn?

• Replies: 2
• Views: 1,117
Jun 4th 2010, 07:02 AM
10. ### Angle in a triangle

• Replies: 2
• Views: 860
Jun 4th 2010, 06:28 AM
11. ### Simple 3D Vector geometry question about planes and lines!

• Replies: 1
• Views: 657
Jun 4th 2010, 05:03 AM
12. ### Geometry-Circle-Cylinder help

• Replies: 3
• Views: 455
Jun 4th 2010, 03:38 AM
13. ### can someone check my coordinate points?

• Replies: 1
• Views: 431
Jun 3rd 2010, 10:25 PM
14. ### cosine inequality

• Replies: 1
• Views: 419
Jun 3rd 2010, 09:32 PM
15. ### locus and equations need help

• Replies: 6
• Views: 446
Jun 3rd 2010, 06:59 PM
16. ### vectors, triangle, proof, problem!

• Replies: 1
• Views: 423
Jun 3rd 2010, 09:06 AM
17. ### can someone help me with coordinate problems?

• Replies: 7
• Views: 370
Jun 2nd 2010, 05:10 PM
18. ### Tangent plane to ellipsoid

• Replies: 5
• Views: 890
Jun 2nd 2010, 03:56 PM
19. ### rectangle

• Replies: 1
• Views: 313
Jun 2nd 2010, 12:40 PM
20. ### cirlces and detrmineing the length

• Replies: 1
• Views: 598
Jun 2nd 2010, 12:30 PM
21. ### One last problem.

• Replies: 3
• Views: 2,370
Jun 2nd 2010, 09:34 AM
22. ### Diameter question.

• Replies: 4
• Views: 2,548
Jun 2nd 2010, 08:35 AM
23. ### A how to question.

• Replies: 2
• Views: 265
Jun 2nd 2010, 08:03 AM
24. ### 3 points on a line

• Replies: 4
• Views: 405
Jun 2nd 2010, 07:56 AM
25. ### Scaling ratio in percentage between two different resolutions

• Replies: 1
• Views: 788
Jun 1st 2010, 10:33 PM
26. ### Triangle problem.

• Replies: 1
• Views: 480
Jun 1st 2010, 07:27 PM

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### cosx= .4583?

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