You need to know the Breadth 1, Breadth 2, and Height of to Trapezoid to calculate the area.

**Variables:**

1. **b1 **: (Datatype int): to represent the breadth 1 of Trapezoid.

2. **b2 **: (Datatype int): to represent the breadth 2 of Trapezoid.

3. **height **: (Datatype long): to represent the height of Trapezoid.

4. **area_of_trapezoid**: (Datatype long): to store the result of the area of the Trapezoid being computed.

**Functions:**

**printf**(): is used to display something on the console/screen. Format specifier %d in printf function is used to display an int variable on-screen and %ld for long. \n is used to add a new line

**scanf**(): is used to fetch data inputted by the user on the console/screen using the keyboard. %d in scanf is indicated that inputted text is of type int and %ld for long.

**Formula:**

**Area of Trapezoid : (height/2) x (b1 + b2);**

```
/*
* 1000+ C programs + tutorials
*
*
* 8_calculate_area_of_trapezoid.c
*
*
* Created on: Oct 20, 2014
* Author: Code2care.org
*/
#include <stdio.h>
//#include <conio.h>
void main() {
int height;
int b1,b2; //breadth1 and breath2
long area_of_trapezoid;
// clrscr();
printf(" Program to calculate Area of a Trapezoid : \n\n");
printf(" Enter the Height of a Trapezoid : ");
scanf("%d", &height);
printf("\n\n Enter the Breadth1 value : ");
scanf("%d", &b1);
printf("\n\n Enter the Breadth2 value : ");
scanf("%d", &b2);
area_of_trapezoid = (height/2)*(b1+b2);
printf("\n\n Area of Trapezoid with Height as %d, Breadth1 as %d and Breadth2 as %d =
%ld",height,b1,b2,area_of_trapezoid);
// getch();
}
```

**Output:**

```
Program to calculate Area of a Trapezoid:
Enter the Height of a Trapezoid: 15
Enter the Breadth1 value : 30
Enter the Breadth2 value : 10
Area of Trapezoid with Height as 15, Breadth1 as 30 and Breadth2 as 10 = 280
```

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