using System;
class Program
{
static void Main() {
float a = 5;
float b = 12;
float c = 8;
float d = 6;
float h = 15;
float area = (float) (0.5 * (a + b) * h);
Console.WriteLine("area: " + area);
float perimeter = a + b + c + d;
Console.WriteLine("perimeter: " + perimeter);
}
}
/*
run:
area: 127.5
perimeter: 31
*/