3D Solids Flashcards
What is a cube?
A solid shape with 6 equal square faces, 12 equal edges, and 8 vertices. All angles are right angles.
What is a cuboid?
A solid shape with 6 rectangular faces, 12 edges, and 8 vertices. Opposite faces are equal.
What is a cylinder?
A solid shape with 2 equal circular faces and 1 curved surface. It has no vertices and 2 curved edges.
What is a cone?
A solid with 1 circular base, 1 curved surface, and 1 vertex.
What is a sphere?
A round solid with no faces, edges, or vertices. Every point on the surface is the same distance from the center.
What is a triangular prism?
A solid with 2 triangular faces and 3 rectangular faces. It has 9 edges and 6 vertices.
What is a square-based pyramid?
A solid with 1 square base and 4 triangular faces meeting at a point (vertex).
Which solids have only flat faces
pyramid, and prism
What is a prism?
A solid with 2 identical and parallel faces (called bases) connected by rectangular faces.
What is a pyramid?
A solid with 1 base and all other faces are triangles that meet at a single vertex (point).
What is the main difference between prisms and pyramids?
Prisms have 2 parallel bases; pyramids have only 1 base, and the sides meet at a point.
How do the side faces of prisms and pyramids differ?
A prism’s side faces are rectangles; a pyramid’s side faces are triangles.
What are the bases of a prism and a pyramid like?
Prisms: 2 identical bases (any polygon); Pyramids: 1 base (any polygon) with sides meeting at a vertex.
Can a prism or a pyramid have a circular base?
No. If it has a circular base, it’s called a cylinder (not a prism) or a cone (not a pyramid).
Which shape has more edges—prism or pyramid?
Usually, prisms have more edges because they have more faces and vertices.
