Answer:
float area;
Explanation:
The float datatype is used for storing the decimal number .The syntax of declaring float variable is given below.
float variablename ;
float area;
area=89.900002; // storing the value
following the program in c language
#include<stdio.h> // header file
int main() // main function
{
float area=89.900002; // declared and initialize a float variable
printf("%f",area); // display the area value
return 0;
}