The length of side OA in the given rhombus is: 5 units.
What is a Rhombus?
A rhombus is a quadrilateral that has four sides that are all of the same length. Therefore, in the image given, the length of AB equals the length of OA.
Given the following:
Length of AB = |8 - 3}
Length of AB = 5 units.
AB = OA = 5 units.
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