2. What Are Shapes?
2-Dimensional Shapes.
Properties Of 2 Dimensional Shapes
3-Dimensional Shapes.
Properties Of 3 Dimensional Shapes
Mixture Of Shapes.
3. WHAT ARE
SHAPES?
A shape is a geometrical figure that can be
described with mathematics. One way to
classify shapes is to describe a bigger shape
that the shape fits inside of. For example,
two-dimensional shapes like circles will fit
inside of a flat plane. Three-dimensional
objects like cubes will not fit inside of a
plane, because they are not flat.
4. 2-DIMENSIONAL
SHAPES
These are two-dimensional shapes or flat plane geometry
shapes. Their sides are made of straight or curved lines.
They can have any number of sides. Plane figures made of
lines are called polygons. Triangles and squares are
examples of polygons
5. PROPERTIES OF 2
DIMENSIONAL SHAPES
Two-dimensional shapes are planar. Graphically speaking, they depend on
only two coordinates--x and y, for instance--consisting of x units
and y units, respectively. In the case of a coordinate system of more
than two dimensions, then a 2-D shape would still depend on two
coordinate directions. For example, in a spatial xyz coordinate system
(which is three-dimensional) a two-dimensional shape would be expressed
with points such as (x,y,0), (x,0,z), or (0,y,z). Therefore, it would depend
on either x and y, x and z, or y and z.
2-D shapes include the square, the triangle, the rhombus, etc.
To understand it more easily, you can say that 2-D shapes do not have
prominent or rugged parts. For example, speaking two-dimensionally you
would have a square, whereas three-dimensionally you would have a cube,
which is like an extended or prominent square.
7. PROPERTIES OF 3
DIMENSIONAL
SHAPES
Three-dimensional shapes have four properties
that set them apart from two-dimensional
shapes: faces, vertices, edges and volume.
These properties not only allow you to
determine whether the shape is two- or three-
dimensional, but also which three-dimensional
shape it is.
