2 Plug the length and the width into the formula. In simple words the length of a diagonal is equal to the length of a side multiplied by the square root of 2 that is 1414. Suppose the side of square measures 13 cm then its diagonal will be d s2.
Establish two parallel lines for the the width.
If You Know the Area 1. Consider a square of sides a units and diagonal as d units. Each diagonal bisects the other. ENTER ANY ONE VALUE Use the calculator above to calculate the properties of a square.