Quadrilateral
Draw any square or rectangle, and you have it.
Sure. It's called a "square"; you can consider the square a special case of a rectangle.
To construct 1, only four are required, while there could be any number of lines within the square.
Squaring the Circle
You need four of them in order to construct a square.
Yes.
You need four of them in order to construct a square.
Quadrilateral
Draw any square or rectangle, and you have it.
they were trying to construct a square that perfectly circumscribes (surrounds) a given circle.
Sure. It's called a "square"; you can consider the square a special case of a rectangle.
To construct 1, only four are required, while there could be any number of lines within the square.
It depends on the height!
10,000
One square centimetre measures 1 cm, in length, width and depth. One square m (metre) would measure 100 centimetres in length, width and depth. So 100x100x100 would mean 1,000,000 (1 million) square centimetres would be needed to construct a square with 1m (metre) sides.
Squaring the Circle