# Basic Java programming exercises

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## Java program to find angles of triangle if two angles are given

Write a Java Program to input two angles from user and find third angle of the triangle. How to find all angles of a triangle if two angles are given by user using Java programming. Java program to calculate the third angle of a triangle if two angles are given.

##### Required knowledge

Arithmetic operators, Data types, Basic input/output

##### Properties of triangle

Sum of angles of a triangle is 180°. Let us apply basic math to derive formula for third angle. If two angles of a triangle are given, then third angle of triangle is given by -

c=180-(a+b)

##### Logic to find third angle of a triangle

Step by step descriptive logic to find third angle of a triangle -

1. Input two angles of triangle from user. Store it in some variable say a and b.

2. Compute third angle of triangle using formula c = 180 - (a + b).

3. Print value of third angle i.e. print c.

##### Program to find angles of a triangle
```/**
* Java program to find all angles of a triangle if two angles are given
*/

import java.util.Scanner;
class Test
{
public static void main(String args[])
{
int a, b, c;
Scanner op=new Scanner(System.in);
/* Input two angles of the triangle */
System.out.print("Enter First angles of triangle: ");
a=op.nextInt();
System.out.print("Enter Second angles of triangle: ");
b=op.nextInt();;

/* Compute third angle */
c = 180 - (a + b);

/* Print value of the third angle */
System.out.println("Third angle of the triangle = "+c);
}
}
```

##### Output:

```Enter First angles of triangle: 70
Enter Second angles of triangle: 80
Third angle of the triangle = 30
```