hi I'm Ashley and welcome to 3d shapes
have you watched our videos on 2d shapes
yet if not you should probably go watch
those first and then come back to this
one in the 2d shapes videos we learned
that 2d shapes are flat like a sheet of
paper 3d shapes are a little bit
different
they take up more space like a box and a
ball are you ready to learn the shapes
let's go this is a sphere a sphere is
like a ball like a baseball or
basketball and is perfectly round there
are no sides or corners if you were to
draw a line from the very center of a
sphere like the inside of the ball and
go to an edge it would be the same
distance from the center to any point on
the ball this is a sphere
here we have a cube the cube is
basically alike a box now you have sides
where each side is a perfect square this
is a cube now this is a rectangular
prism it's similar to a cube but not
exactly see the difference is you have a
side here on this end and another one
here on this end you can't really see it
but it's down there and those are either
squares or rectangles and they are the
exact same size now the two on opposite
ends that are the exact same size and
shape are called your base so that's
going to be a square or rectangle in
shape and then you have rectangles
connecting each side of the base
rectangles that are the same on this end
so then you have 1 2 3 down here on the
bottom and 4 down there and or back
there in the back that you can't see
this is a rectangular prism now here we
have a triangular prism same idea you
have two bases one on each end that are
the same size and shape this time they
are triangles instead of rectangles and
the sides or faces that connect them are
rectangles this is a triangular prism
this is a cylinder a cylinder has
circles four bases so there's one here
and then one down here on this end and
then you because the ends or the bases
are circles the sides connecting the two
are not flat they are curved like the
circle a cylinder you might find at your
house is a kN
now here we have a cone a cone has one
base where the base is a circle in shape
and then the other end there is no shape
it just comes to a point so you have a
circle and then your side or face comes
up to a point
so curved all the way around to a point
at the top this is a cone do you like to
eat ice cream out of a cone I do
this is a square pyramid where the base
you only have one of them is a square
then you have four sides coming up from
that square base each of those sides is
a triangle and they all meet together at
the top you see this triangle side or
face you have one on each side coming up
from the square base to a point here at
the top this is a square pyramid now
here we have a triangular pyramid same
idea only the base is a triangle instead
of a square you see that then you have
triangles coming up from each side that
meet at the top
and then one here
and then the very back is also a
triangle this is a triangular pyramid
and that's it we just learned our 3d
shapes be sure to practice what you've
learned with our fun online games and
quizzes and remember to always be clever