Concept explainers
Geometry Calculator
Design a Geometry class with the following methods:
- A static method that accepts the radius of a circle and returns the area of the circle. Use the following formula:
Area = πr2
Use Math.PI for π and the radius of the circle for r.
- A static method that accepts the length and width of a rectangle and returns the area of the rectangle. Use the following formula:
Area = Length × Width
- A static method that accepts the length of a triangle’s base and the triangle’s height. The method should return the area of the triangle. Use the following formula:
Area = Base × Height × 0.5
The methods should display an error message if negative values are used for the circle’s radius, the rectangle’s length or width, or the triangle’s base or height.
Next, write a program to test the class, which displays the following menu and responds to the user’s selection:
Geometry Calculator
- 1. Calculate the Area of a Circle
- 2. Calculate the Area of a Rectangle
- 3. Calculate the Area of a Triangle
- 4. Quit
Enter your choice (1-4):
Display an error message if the user enters a number outside the range of 1 through 4 when selecting an item from the menu.
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