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Inheritance Practice

You discovered that to properly calculate army formations in the game, you needed to be able to get the area and perimeter of squares and rectangles of various sizes.

A rectangle's perimeter is the total distance around its four sides: two lengths plus two widths, or 2 * (length + width).

Assignment

Complete the Rectangle and Square classes. All squares are rectangles, but not all rectangles are squares.

Complete the Rectangle class:
1. Complete the constructor. It accepts length and width, and stores them as public instance variables with the same names.
2. Complete the get_area(self) -> int method. It returns the rectangle's area.
3. Complete the get_perimeter(self) -> int method. It returns the rectangle's perimeter.
Complete the Square class:
1. Complete the constructor.
2. Make sure the square's length and width are always the same.

Because Square inherits Rectangle's methods, it should only need to implement __init__.