Geometry - 3D Shapes (Rolling, Sliding, Stacking)
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00:00Hi kids! Today we will learn which type of shapes can roll, slide, or can be stacked
00:10upon each other. So let's get started!
00:17This is rolling. Any object that has completely round curved surface can roll on any flat
00:27surface. Now let's see a few shapes that can roll.
00:36Sphere can roll as it is curved all around. This is an ellipsoid. It can roll too, as
00:49it is curved all around. A cylinder can roll as it has one curved surface. This is a frustum.
01:06It can roll too, as it too has a curved surface. This is a torus shape. It can roll as it is
01:19round in shape and is curved all around. So kids, we learned what's rolling and a few
01:30shapes that can roll. Now we will learn what's sliding. This is sliding. Any object that
01:45has at least one flat face can slide on any flat surface. Now let's see shapes that can
01:56slide. This is a cube. It can slide as it is has all flat faces. This is a cuboid. It
02:12can slide as it too has all flat faces. This is a prism. It can slide as it too has all
02:25flat faces. This is a pyramid. It too can slide as it too has flat faces. Hemisphere. It can slide
02:45as it has one flat face. Cone. Cone can slide as it has one flat face at its bottom.
03:00This shape is frustum. It can also slide as it has two flat faces. One on the top
03:11and one on the bottom. This is wedge shape. It can also slide as it has all flat faces.
03:26So kids, we learned what's sliding and a few shapes that can slide.
03:32Now we will learn what's stacking. This is stacking. That is keeping a thing on top of other thing.
03:51Any object that has at least one flat face can be stacked on top of any flat object.
04:01Now let's see shapes that can be stacked. Cube. It can be stacked as it is and has all flat faces.
04:16Cuboid. It can also be stacked as it too has all flat faces.
04:30Prism. We can stack it on top of anything but we cannot stack anything on a prism as it has a
04:41pointed top. Pyramid. We can stack it on top of anything but cannot stack anything on a pyramid
04:57as it has a pointed top. Hemisphere. We can stack it on top of anything
05:06but cannot stack anything on a hemisphere as it has a curved top.
05:14Cone. We can stack it on top of anything but we cannot stack anything on a cone
05:26as it has a pointed top. Frustum. Yes, we can stack frustum shapes as they have two flat faces.
05:41Rectangular prism. Yes, we can stack rectangular prisms as they have all flat faces.
05:53Cylinder can be stacked as it has flat faces both on top and bottom. Wedge. Yes, wedge shape
06:09wedge shape can be stacked as it has flat faces.
06:17Kids, here is an exception. Here we have a torus shape and it has no flat face
06:26but they can be stacked upon each other. So kids, today we learned what is rolling,
06:36sliding, and stacking. Now you may go ahead and take a quiz to learn more. Bye-bye!