The length of one diagonal of a rhombus is 8 cm. The area of the
rhombus is 72 square centimeters. What is the length of the other
diagonal of the rhombus?

The area of the rhombus: d₁ · d₂/2

8 cm · d₂/2 = 72 cm²

4 cm · d₂ = 72 cm²           | : 4 cm

18

Step-by-step explanation:

A=P*Q/2

72=P*8/2

72=P*4

Isolate the variable by dividing both sides by 4

72/4=18

P*4/4=P

18=P

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.