Toán tiếng anh toán song ngữ cambridge lớp 1 hình khối Shapes

Properties of 3D Shapes

You will need to remember the names and properties of many 3D shapes, the number of faces they have, the shapes of the faces and where they have planes of symmetry.

What 3D shapes should I know?

You should know the general names of prisms
- A prism is a 3D shape with the same cross-section throughout
  - The cross-section of a cube is a square
  - The cross-section of a cuboid is a rectangle
  - The cross-section of a cylinder is a circle
- You will also have to work with other prisms, such as triangular prisms
  - In these cases the exam question will make sure the shape of the cross-section is clear
You should know the names and properties of the different types of pyramids
- A pyramid has a flat base with sloping sides that meet at a point at the top
- The base will be a 2D shape
- Most pyramids are named after the shape of their base
  - e.g. a square–based pyramid
- Some pyramids have special names you should know
  - A cone has a circular base
  - A tetrahedron’s base is an equilateral triangle
You should know the name and properties of a sphere