Exploring Three-Dimensional Shapes in Grade 1 Math

This video tutorial introduces three-dimensional geometry, focusing on 3D shapes like cubes, spheres, rectangular prisms, cones, and cylinders. It explains the differences between 2D and 3D shapes, highlighting their dimensions and surfaces. The tutorial includes activities to match shapes with their surfaces and identifies 3D shapes in real-life objects. The video concludes with a review of key concepts, preparing viewers for the next lesson on combining 3D shapes.

What distinguishes a 3D shape from a 2D shape?

• 3D shapes have only one dimension.

• 3D shapes can only be squares or circles.

• 3D shapes have three dimensions: length, width, and height.

• 2D shapes have three dimensions.

How many flat surfaces does a cube have?

• 8

• 6

• 4

• 2

How many flat surfaces does a rectangular prism have?

• 8

• 6

• 2

• 4

Which shape has only one flat surface?

• Cylinder

• Rectangular Prism

• Sphere

• Cone

Which card matches a sphere's surfaces?

• Only a curved surface

• Both flat and curved surfaces

• Only flat surfaces

• No surfaces

Which 3D shape is a baseball most like?

• Cone

• Cylinder

• Sphere

• Cube

What real-world object is shaped like a cylinder?

• Soccer ball

• Cardboard box

• Ice cream cone

• Can of paint

Does a cylinder have curved surfaces?

• Yes, it has one curved surface.

• No, it does not have any curved surfaces.

• Yes, it has two curved surfaces.

• Yes, it has curved and flat surfaces.

Which shape does not have any corners?

• Cube

• Sphere

• Rectangular Prism

• Cylinder

What is the shape of the faces on a cube?

• Triangles

• Squares

• Rectangles

• Circles