Diagonal of the rectangle

Calculate the rectangle's diagonal, which area is 54 centimeters square, and the circuit is equal to 30 cm.

Correct answer:

u =  10.8167

Step-by-step explanation:

S=54 o=30 S = a b o = 2 (a+b) S=a (o/2a) 54=a (30/2a)  54=a (30/2a) a215a+54=0  p=1;q=15;r=54 D=q24pr=1524154=9 D>0  a1,2=2pq±D=215±9 a1,2=215±3 a1,2=7.5±1.5 a1=9 a2=6 a=a1=9 b=a2=6 u=a2+b2=92+62=3 13=10.8167

Our quadratic equation calculator calculates it.




Did you find an error or inaccuracy? Feel free to write us. Thank you!







Tips for related online calculators
Are you looking for help with calculating roots of a quadratic equation?
Do you have a linear equation or system of equations and looking for its solution? Or do you have a quadratic equation?
The Pythagorean theorem is the base for the right triangle calculator.

You need to know the following knowledge to solve this word math problem:


 
We encourage you to watch this tutorial video on this math problem: video1   video2

Related math problems and questions: