## Description

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: