geometrycalculator

public class GeometryCalculator {

    public static float areaCircle( float radius ) {

        if( radius < 0 )

            System.out.println("Can not have negative numbers");

        return (float) (Math.PI * ( radius * radius ));

    }

    public static float areaRectangle(float length, float width){

        if( length < 0 || width < 0 )

            System.out.println("Can not have negative numbers");

        return (float) ( length * width );



    }

    public static float areaTriangle(float base, float height){

        if( base < 0 || height < 0)

            System.out.println("Can not have negative numbers");

        return (float) ( base * height * 0.5 );

    }

}