Circular Table

A circular table measures about .9 m around its edge. What is the approximate length of its diameter. Would you please explain this to us and how to work the problem. Thank you.

Proof

1- prove that a non-simple puadrilateral can be inscribed in a circle <=> opposite angles are equal (both direction)

Polygons

Show that the number of diagonals in a polygon is never the same as the sum of the measures of the exterior angles, one per vertex, of the polygon.

Proof

If O is an interior point of triangle ABC prove that OA+OB+OC a- is greater than 1/2 (perimeter of triangle ABC) b- is less than the perimeter of triangle ABC

Proof

BE is a median of triangle ABC. The line through C and the midpoint H of BE meets AB at F. prove that AF/FB=2. You must use a parallogram proof hint: extend BE to 3/2 of its lenght