Question

Pascal (Free) Пусть элементами круга являютс радиус (1-й элемент), диаметр (2-й элемент), длина окружности (3-й элемент). по номеру одного из перечисленных элементов и его значению вычислить площадь круга

Answer 1

var i:integer;

s,v:real;

Begin

  read(i,v);

  case i of

    1: s:=pi*v*v;

    2: s:=pi*v*v/4;

    3: s:=v*v/pi/4;

  end;

  writeln(s);

End.

Answer 2

Calculating the Area of a Circle in Pascal

To calculate the area of a circle in Pascal, we can use the formula: Area = π * r^2, where r is the radius of the circle.

Using the Given Elements to Calculate the Area

Let's use the given elements to calculate the area of the circle: - Radius (1st element) - Diameter (2nd element) - Circumference (3rd element)

Calculating the Area Using the Radius

If we have the radius of the circle, we can directly calculate the area using the formula Area = π * r^2.

program CalculateCircleArea;
var
   radius, area: real;
begin
   { Assuming the radius is provided as input }
   radius := 5; { Replace 5 with the actual value of the radius }
   
   { Calculating the area }
   area := Pi * radius * radius;
   
   { Displaying the area }
   writeln('The area of the circle is: ', area:0:2);
end.

Conclusion

Using the given elements, particularly the radius, we can easily calculate the area of the circle in Pascal using the formula Area = π * r^2.