2-D and 3-D Shapes
We need to know both 2-D and 3-D shapes in math. The 2-D shapes we should know include: square, rectangle, circle, triangle, rhombus, hexagon, and octagon. We sort, create, and compare the shapes. We learn how many sides and vertices each shape has. The vertices are the corners, so for example, a square has 4 sides and 4 vertices.
Here are some games to play at home:
We also need to learn about 3-D shapes, including a cube, cylinder, cone, and sphere. We compare the 3-D shapes to the 2-D shapes and notice things, such as how a cube is like a square. We also sort and compare the 3-D shapes, such as looking at how the move. For example, a cylinder can roll, slide, and stack. We look around the room and compare objects to 3-D shapes. For example, a can is a cylinder and a ball is a sphere. You can do this at home. Have your child look around the house and find different 3-D shapes.