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Algebra_3

Chapter 51

Problem 4

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The circumference of a circle C = 2 π r.
The area of a circle A = π r2 and π = 3.14
Given: The diameter of a circular plot D = m.
The area of the circular plot A = m2.



Example:
The radius of a circular lot is given as r = 1.1 m.
The area of the lot is A = 3.14r2 m2.
The area of the lot can be written as click on refresh (F5) m2.

Enter 3.14(1.1^2) in the Function f(x) = box.
Next click on the Plot Graph button in the graphing calculator below.
the answer will appear below the Function f(x)= box as f(x) = 3.7994.
Note the parentheses that are needed.
Thus you can check your calculations with this Graphing Calculator.

Graphing Calculator