1. ## Geometry help

The diagonals AC and BD of quadrilateral ABCD intersect at O. Given the information
AO = BO and CO = DO, what can you deduce about the lengths of the sides of

I need to write a 2 column proof for this and I'm having some difficulties.

2. ## Re: Geometry help

The diagonals AC and BD of quadrilateral ABCD intersect at O. Given the information
AO = BO and CO = DO, what can you deduce about the lengths of the sides of

I need to write a 2 column proof for this and I'm having some difficulties.
Well why not try one on your own.

3. ## Re: Geometry help

The diagonals $\displaystyle AC$ and $\displaystyle BD$ of quadrilateral $\displaystyle ABCD$ intersect at $\displaystyle O.$
Given $\displaystyle AO = BO$ and $\displaystyle CO = DO$,
what can you deduce about the lengths of the sides of the quadrilateral?
I know very little about the lengths of the sides.

We have an isosceles trapezoid.
Hence: ,$\displaystyle AD = BC,\;AB \parallel CD.$

Code:
            A o-------o B
/  *   *  \
/     *     \
/    * O *    \
/   *       *   \
/  *           *  \
/ *               * \
/*                   *\
D o-----------------------o C