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Algebra
Chapter 25
Problem 5
Select a different problem
Example:
The area of a square plate A = 25 cm
2
Find the perimeter of the square.
Solution: The area of a square
where s is the length of each of the four sides of the square.
So the length of a side of the square
 )
The perimeter of the square
 )
Substituting A = 25 cm
2 into the equation gives
 = 4\sqrt(25cm^2) = 20cm )
This can be solved using the graphing calculator by entering 4*25^(1/2) into the Function f(x)= box.
Then click on the Plot Graph button. The answer will appear as f(x) = 20 below the Function f(x)= box.
Note that 25^(1/2) is the same as the square root of 25
