Properties of shape - Count edges on 3D shapes - Worksheet

The worksheet titled 'Count Edges on 3-D Shapes' is an educational resource that helps children to identify and count the edges on various three-dimensional shapes. It serves as a practical application of their knowledge of faces and curved surfaces, explaining that an edge is formed where two faces meet or where a face meets a curved surface. The worksheet encourages children to mark each edge to prevent overcounting and provides a 3D shape mat to assist them in identifying the names of different shapes, such as cuboids, cylinders, cubes, cones, square-based pyramids, and triangular prisms. The activity is designed to enhance their fluency and precision in dealing with geometrical properties.

Furthering their understanding, the worksheet presents more challenging shapes and includes a table where children must fill in the name of the shape along with the number of edges and faces it has. Examples of completed tables show shapes like the tetrahedron, hexagonal pyramid, and hexagonal prism, with their corresponding edges and faces listed. Additionally, the worksheet incorporates reasoning and problem-solving questions, prompting children to sort shapes based on the number of edges and to discuss whether different shapes always have a different number of edges. This comprehensive approach to learning about the edges on 3D shapes not only solidifies mathematical concepts but also develops critical thinking skills.