Question:C program for area of equilateral triangle 

Answer 
#include<stdio.h>
#include<math.h>

int main(){

    float a;
    float area;

    printf("Enter size of side of the equilateral triangle : ");
    scanf("%f",&a);

    area = sqrt(3)/4*(a*a);

    printf("Area of equilateral triangle is: %.3f",area);

    return 0;
}
Sample output:
Enter size of side of the equilateral triangle: 5
Area of equilateral triangle is: 10.825 

+ ExplanationNot Moderated
Formula of area of equilateral triangle:
Area = (√3)/4 * (a*a)

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Mohammad Towhidul Islam

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