If one diagonal of a quadrilateral bisects the other, then it also bisects the quadrilateral.

Explanation

To prove that if one diagonal of a quadrilateral bisects the other, then it also bisects the quadrilateral, we can follow these steps:

### Step 1: Define the Quadrilateral
Let the quadrilateral be defined as \(ABCD\) with diagonals \(AC\) and \(BD\) intersecting at point \(O\). According to the problem, diagonal \(AC\) bisects diagonal \(BD\), which means:
\[ AO = CO \quad \text{and} \quad BO = DO \]

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