In this tutorial you will learn about the C program to enter two angles of a triangle and find the third angle. and its application with practical example.
In this tutorial, we will learn to create a C program that will find side of a Triangle.If two side of a Triangle are given using C programming.
Prerequisites
Before starting with this tutorial we assume that you are best aware of the following C programming topics:
- Arithmetic operators
- Data types
- Basic input/output.
Basic Properties of triangle
The sum of the interior angle on the same vertex is 180°
C Program to enter two angles of a triangle and find the third angle.
Here we take two side of a triangle and with the help of angle property we will find the required third side of a triangle ,Let’s take a look to program.
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#include<stdio.h> int main() { float ang1,ang2,ang3; // list or arguments printf("Enter two side or angles of a triangle \n"); scanf("%f%f",&ang1,&ang2); // getting values ang3= 180 - (ang1 + ang2); // calculating third side printf("\n Third side of a Triangle is = %.1f", ang3); return 0; } |
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#include<stdio.h> int main() { float ang1,ang2,ang3; // list or arguments printf("Enter two side or angles of a triangle \n"); scanf("%f%f",&ang1,&ang2); // getting values ang3= 180 - (ang1 + ang2); // calculating third side printf("\n Third side of a Triangle is = %.1f", ang3); return 0; } |
output
the above program, we have first declared and initialized a set variables required in the program.
- ang1 =it is for holding the angle value 1.
- ang2 =it is for holding the angle value 2.
- ang3 =it is for holding the angle value 3.
One of the common property of a triangles is that all three(3) interior angles (∠a + ∠b +∠c) of a triangle on adding will give to 180 degrees. This is an important theorem of geometry also known as Triangle Angle Sum Theorem(∠a + ∠b +∠c).According to this Theorem, the sum of the three interior angles in a triangle is always 180°.
So using this triangle angle sum theorem we create a program in which we get two angle from user and by adding them subtract from 180 -(ang1+ang2) we will get our required third angle .
as we can see here by adding two given angle and subtract them from 180 we get the third required angle ..
