Symmetry and Surface Area.
Symmetry- an object or image has symmetry if it is balanced and can fit onto itself either by reflection or rotation.
Line symmetry- a line running through the centre of an object or design such that the halves on each side of the line are mirror images. These lines can be vertical, horizontal, or oblique. A figure may have more than one line of symmetry. Also called a line of reflection.
You can find the lines of symmetry by counting the grid.
Line symmetry- a line running through the centre of an object or design such that the halves on each side of the line are mirror images. These lines can be vertical, horizontal, or oblique. A figure may have more than one line of symmetry. Also called a line of reflection.
You can find the lines of symmetry by counting the grid.
Surface Area- the number of square units needed to cover a 3-D object. The sum of the areas of all the faces of an object.
Formula for a cube- 6s squared.
Formula for a triangle- bxh divided by 2.
Formula of a rectangle- 2 (wl+hl+hw)
Those are the basic things you need to know when it comes to surface area.
Formula for a cube- 6s squared.
Formula for a triangle- bxh divided by 2.
Formula of a rectangle- 2 (wl+hl+hw)
Those are the basic things you need to know when it comes to surface area.