xuly.java

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package tamgiac;

/**
 *
 * @author Dinh
 */
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author NOBITO
 */
public class xuly {
    static double a, b, c, chuvi, dientich, A, B, C;
    public void nhap() {
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
            System.out.println("Nhập cạnh a:");
            String s = br.readLine();
            a = Double.parseDouble(s);
            System.out.println("Nhập cạnh b:");
            s = br.readLine();
            b = Double.parseDouble(s);
            System.out.println("Nhập cạnh c:");
            s = br.readLine();
            c = Double.parseDouble(s);
            System.out.println("Nhập góc A:");
            s = br.readLine();
            A = Double.parseDouble(s);
            System.out.println("Nhập góc B:");
            s = br.readLine();
            B = Double.parseDouble(s);
            System.out.println("Nhập góc C:");
            s = br.readLine();
            C = Double.parseDouble(s);
        } catch (IOException ex) {
            Logger.getLogger(xuly.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
public double chuvi() {
        return a + b + c;
    }

public double dientich() {
        double P, S;
        P = chuvi() / 2;
        S = Math.sqrt(P * (P - a) * (P - b) * (P - c));
        return S;
    }
public double noitiep(){
    double P, nt;
    P = chuvi()/2;
    nt = Math.sqrt(((P - a) * (P - b) * (P - c))/P);
    return nt;
}
public double ngtgA(){
    double P, ngtA;
    P = chuvi()/2;
    ngtA = P*(Math.tan(A));
        return ngtA;
}
public double ngtgB(){
    double P, ngtB;
    P = chuvi()/2;
    ngtB = P*(Math.tan(B));
        return ngtB;
}
public double ngtgC(){
    double P, ngtC;
    P = chuvi()/2;
    ngtC = P*(Math.tan(C));
        return ngtC;
}
}