# Geometry Forum

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

1. ### Surface Area of a Truncated cube

• Replies: 1
• Views: 2,216
May 3rd 2009, 08:57 PM
2. ### Area of Isosceles Trapezoid

• Replies: 1
• Views: 703
May 3rd 2009, 04:44 PM
3. ### Construction: How?

• Replies: 1
• Views: 506
May 3rd 2009, 03:27 PM
4. ### collinear points

• Replies: 18
• Views: 1,683
May 3rd 2009, 08:13 AM
5. ### Angle between plane and xy-plane

• Replies: 6
• Views: 1,423
May 3rd 2009, 07:31 AM
6. ### polar form of ellipse

• Replies: 2
• Views: 2,257
May 3rd 2009, 07:15 AM
7. ### Some Questions !

• Replies: 1
• Views: 677
May 3rd 2009, 03:09 AM
8. ### Volume of Sphere

• Replies: 4
• Views: 703
May 2nd 2009, 08:01 PM
9. ### Area of Rectangle

• Replies: 3
• Views: 780
May 2nd 2009, 06:46 PM
10. ### a difficult geometry proof

• Replies: 2
• Views: 1,114
May 1st 2009, 05:31 PM
11. ### Regular Heptagon

• Replies: 2
• Views: 818
May 1st 2009, 12:33 PM
12. ### the matrix

• Replies: 6
• Views: 324
Apr 30th 2009, 08:16 PM
13. ### EndPoint based on Length and Angle

• Replies: 4
• Views: 824
Apr 30th 2009, 11:10 AM
14. ### Ortho-centre of triangle?

• Replies: 0
• Views: 589
Apr 30th 2009, 07:38 AM
15. ### Coordinates of linked equidistant points on R3

• Replies: 0
• Views: 543
Apr 29th 2009, 06:00 PM
16. ### Formula of Parabola = ??

• Replies: 2
• Views: 492
Apr 29th 2009, 06:36 AM
17. ### angle of the triangle

• Replies: 8
• Views: 1,103
Apr 28th 2009, 10:31 PM
18. ### Geometry Circles

• Replies: 5
• Views: 802
Apr 28th 2009, 02:17 PM
19. ### Distance between points in a square

• Replies: 1
• Views: 557
Apr 28th 2009, 09:47 AM

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### cosx= .4583?

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