I assume you mean the calculation required. Split the irregular shape up into shapes for which you can find the area (eg rectangles, triangles), then the area of the shape is the sum of the areas of the smaller shapes.
yes
You need 4 rectangles and two squares * * * * * No, you do not need to have squares: there can be six rectangles - as in a brick shape.
There is no 3D shape with 6 faces: 4 rectangles and 2 triangles. See the link for all forms of hexahedra.
Hexagonal Prism.
Yes cutting a rectangle in half (either horizontally or vertically) will yield two smaller rectangles (each of which is the same size and shape as the other).
Yes
Yes
Yes, they will be the same size and shape as each other.
a smaller cylinder when cut horizontally. A semi-circle when cut vertically
yes Sometimes those rectangles could be squares, which are by definition a type of rectangle.
You divide the shape into smaller shapes you can calculate, like rectangles and triangles. If the shape is irregular, you have to approximate, for example by dividing it into many narrow rectangles. This technique is called "integration".
you can move horizontally or vertically either way 2 spaces, then move another 1 so it makes an L shape
A line of symmetry is when an imaginary line passes through the center of a shape vertically or horizontally creating a 'mirror image'
It has two lines of symitry. Symitry is when you can fold something in half and you get the same shape in both sides. For exaple: in a circle you have the same shape if you fold it horizontally or vertically. :)
No, once a knight has moved to a new position on the chessboard, it cannot return to its original position in the same turn. The knight always moves in an L-shape pattern, either two squares horizontally and one square vertically, or two squares vertically and one square horizontally.
An ellipse is an ovular shape that consists of equally sized parts when cut in half vertically or horizontally. Ellipses are commonly used in various forms of mathematics.