formulas/areas

public class formulas {
    double area;
    double perimetro;
    //double radio;
    public double trapecio (double bma, double bme, double h){

        return  (bma + bme ) * h;
    }
    public double circulo (double radio){
    area = Math.PI * Math.pow(radio,2);
    return area;
    }
    public double pentagono (double lado, double apotema){
        perimetro = lado*5;
        return (perimetro * apotema) / 2;

    }
}