# Geometry Forum

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

1. ### Ortho centrical tetrahedron - parallelity of planes

• Replies: 1
• Views: 467
Dec 18th 2011, 07:10 AM
2. ### Volume using mass and density.

• Replies: 3
• Views: 786
Dec 15th 2011, 04:57 PM
3. ### deductive geometry questions

• Replies: 6
• Views: 1,012
Dec 15th 2011, 11:17 AM
4. ### circles,tangents problem...

• Replies: 7
• Views: 688
Dec 13th 2011, 10:29 PM
5. ### Area of intersection of two circles

• Replies: 1
• Views: 1,309
Dec 13th 2011, 07:36 PM
6. ### Similar triangles

• Replies: 7
• Views: 597
Dec 11th 2011, 08:47 PM
7. ### [SOLVED] Surface area for cylinder does not work unless in CM?

• Replies: 2
• Views: 676
Dec 11th 2011, 07:35 PM
8. ### The Straight Line Question

• Replies: 12
• Views: 925
Dec 11th 2011, 05:11 AM
9. ### parallelogram - proof

• Replies: 7
• Views: 748
Dec 10th 2011, 06:57 PM
10. ### Measure of marked Angle

• Replies: 2
• Views: 601
Dec 6th 2011, 05:07 PM
11. ### Travelled vs Displacement

• Replies: 3
• Views: 537
Dec 6th 2011, 10:33 AM
12. ### Rotating point about the line y=-x

• Replies: 2
• Views: 1,038
Dec 4th 2011, 08:41 AM
13. ### [SOLVED] Solid Geometry

• Replies: 2
• Views: 3,509
Dec 3rd 2011, 10:49 AM
14. ### Need some help understanding what this question is asking.

• Replies: 2
• Views: 681
Dec 1st 2011, 05:11 PM
15. ### The Superman Problem

• Replies: 6
• Views: 1,193
Dec 1st 2011, 12:38 PM
16. ### Rotation in 3d

• Replies: 1
• Views: 635
Nov 30th 2011, 03:36 PM
17. ### constructing a line

• Replies: 3
• Views: 582
Nov 28th 2011, 03:41 PM
18. ### Solving for volume of rectangular prism

• Replies: 3
• Views: 1,136
Nov 28th 2011, 10:33 AM
19. ### Co-ordinate Reflection/Rotation Problem

• Replies: 2
• Views: 662
Nov 28th 2011, 01:27 AM
20. ### Solve this line with the simplest method

• Replies: 6
• Views: 571
Nov 27th 2011, 09:42 AM
21. ### Basic Pi related question - comparing circles

• Replies: 4
• Views: 796
Nov 27th 2011, 07:34 AM

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### cosx= .4583?

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