Geometry - 3D Shapes (Cylinder, Cube, Cuboid, Wedge And Torus)
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00:00Hi kids! Today we will learn some interesting 3D shapes and their characteristics.
00:14Let us start with a cylinder. A cylinder is a 3D figure with two parallel bases, which
00:26are usually circular, connected by a curved surface. So, it has three bases. Two flat
00:40round shaped bases, one at the top and one at the bottom. And third base is its curved
00:51surface. It has two edges, which are round in shape, three faces and no vertex. These
01:05are a few objects, which are cylinder in shape. Now, let's learn about another 3D shape.
01:17A cube. A cube is a three-dimensional figure, which is box-shaped and has six equal faces,
01:32which are all square in shape. So, let's count its vertices. 1, 2, 3, 4, 5, 6, 7, 8. So,
01:53a cube has eight vertices. Now, let's count its edges. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12. So,
02:20a cube has 12 edges and all are equal. Now, let's count its faces. 1, 2, 3, 4, 5, 6. So,
02:40a cube has six faces, which are all equal and square in shape. These are a few things, which
02:52have cube shape. Now, let's learn another 3D shape. Cuboid. A cuboid is a three-dimensional
03:07figure, which is also box-shaped, like a cube. Cuboid also has six faces, eight vertices and 12
03:20edges, like a cube. But, all its faces are not equal. And, four faces of cuboid are necessarily
03:35rectangular in shape. These are a few things, which have cuboid shape. Now, we will learn one
03:48more interesting shape, that is a wedge. Wedge is a 3D shape that has two triangles and three
04:01rectangle shape faces. It is similar to a triangular prism. Let's count its vertices. 1,
04:162, 3, 4, 5, 6. So, a wedge has six vertices. Now, let's count its edges. 1, 2, 3, 4, 5, 6, 7, 8, 9.
04:40So, a wedge has nine edges. Now, let's count its faces. 1, 2, 3, 4, 5. So, a wedge has five faces.
04:59So, kids, what have we learned? We have learned a wedge has five faces, nine edges and six vertices.
05:11These are some of the common things of this shape. Now, let's learn another 3D shape.
05:22Taurus. Taurus is a 3D shape whose surface has a ring shape, resembling a donut. It has only one
05:40face, that is its surface, which is ring-shaped. It has no vertex and no edge. These are a few
05:53objects of Taurus shape. So, kids, today we learned various interesting 3D shapes. Hope
06:03you enjoyed learning as I did while teaching. Now, you may go ahead and take a quiz to learn
06:11more. Bye-bye.