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# Geometry Forum

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

1. ### Working out the height of a Cuboid

• Replies: 5
• Views: 31,690
Oct 28th 2010, 08:40 AM
2. ### Proof: line segments joining midpoints of opposite sides of quadrilateral bisect

• Replies: 3
• Views: 21,158
May 1st 2012, 01:59 PM
3. ### isosceles triangle inscribed in a circle, find the circle's radius....

• Replies: 2
• Views: 16,983
Feb 6th 2010, 08:31 AM
4. ### [SOLVED] Radius of a rounded corner rectangle

• Replies: 7
• Views: 15,738
Mar 1st 2010, 05:53 PM
5. ### How to convert cartesian equations into vector or parametric equations?

• Replies: 3
• Views: 14,673
Dec 2nd 2008, 10:54 AM
6. ### Convert decimal to fraction of an inch

• Replies: 3
• Views: 13,855
May 11th 2011, 05:21 PM
7. ### what is a semi-vertical angle

• Replies: 4
• Views: 12,508
Oct 15th 2007, 01:47 AM
8. ### Helix / Spring Volume

• Replies: 2
• Views: 12,374
Aug 13th 2007, 09:31 AM
9. ### Cycloidal Gear Form and Clock Wheels

• Replies: 0
• Views: 11,792
Aug 19th 2011, 12:06 AM
10. ### How do you find the side length of a cube if you know the surface area?

• Replies: 2
• Views: 11,204
Mar 30th 2008, 01:54 PM
11. ### Prove that trapezoid inscribed in a circle is isosceles.

• Replies: 3
• Views: 11,167
Dec 27th 2009, 07:57 PM
12. ### Find the coordinates of the point of intersection of perpendicular bisectors

• Replies: 1
• Views: 11,022
May 30th 2012, 12:12 PM
13. ### Equation of a circle in 3d

• Replies: 6
• Views: 10,830
Jan 14th 2011, 12:17 PM
14. ### Rotation Transformation - find center

• Replies: 3
• Views: 10,677
Apr 18th 2012, 11:33 AM
15. ### Circumcenter of a triangle

• Replies: 7
• Views: 9,781
Feb 15th 2009, 12:33 PM
16. ### [SOLVED] Apollonius Theorem

• Replies: 4
• Views: 9,736
Jul 16th 2007, 05:21 AM

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### cosx= .4583?

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