#include <iostream>
#include <cmath>
int main(void) {
double a = 5; // length of two equal sides
double base = 8;
double altitude = sqrt((a * a) - ((base * base) / 4));
std::cout << "Altitude (Height) of Isosceles Triangle = " << altitude;
}
/*
run:
Altitude (Height) of Isosceles Triangle = 3
*/