2. Areas of Trapezoids, Rhombi, and Kites
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We are told that one diagonal of a rhombus is three times as long as the other diagonal. Therefore, if we let d be the first diagonal, the second can be expressed as 3d. We are also told that the area is 168 square centimeters. Let's draw a diagram to illustrate the situation.
Substitute values
LHS⋅2=RHS⋅2
Multiply
LHS/3=RHS/3
LHS=RHS
Rearrange equation
Split into factors
a⋅b=a⋅b
Calculate root