How to find the length of the diagonal of a rhombus Practice Test

Assume quadrilateral is a rhombus. If the area of is square units, and the length of diagonal is units, what is the length of diagonal ?

A rhombus has sidelength ten inches; one of its diagonals is one foot long. Which is the greater quantity?

(a) The length of the other diagonal

(B) One and one-half feet