Cube: 6 square faces, 12 edges, 8 vertices
Rectangular prism: 6 rectangular faces, 12 edges, 8 vertices
Triangular prism: 5 faces, 9 edges, 6 vertices
Square pyramid: 5 faces, 8 edges, 5 vertices
Triangular pyramid (tetrahedron): 4 faces, 6 edges, 4 vertices
Pentagonal prism: 7 faces, 15 edges, 10 vertices
Hexagonal prism: 8 faces, 18 edges, 12 vertices
Cylinder: 2 flat circular faces and 1 curved surface; no vertices
Cone: 1 flat circular face, 1 curved surface, 1 vertex
Sphere: A perfectly round solid; every surface point is the same distance from the center
Hemisphere: Half of a sphere
Face: A flat surface of a solid
Edge: A line where two faces meet
Vertex: A corner where edges meet
Base: The face a solid sits on, or the matching ends of a prism
Prism: A solid with two parallel identical bases and flat rectangular sides
Pyramid: A solid with one base and triangular sides meeting at an apex
Apex: The top point of a pyramid or cone
Euler's formula for polyhedra: Vertices − Edges + Faces = 2
Polyhedron: A solid with only flat faces
Platonic solid: A polyhedron whose faces are all the same regular polygon, with the same number meeting at each vertex
How many Platonic solids are there?: Five
Tetrahedron: Platonic solid with 4 triangular faces
Cube (hexahedron): Platonic solid with 6 square faces
Octahedron: Platonic solid with 8 triangular faces
Dodecahedron: Platonic solid with 12 pentagonal faces
Icosahedron: Platonic solid with 20 triangular faces
Net of a cube: A flat pattern of 6 connected squares that folds into a cube
Lateral face: A side face of a prism or pyramid (not a base)
Slant height: The distance along the sloped side of a cone or pyramid from apex to base edge
Which solid rolls and slides?: A cylinder
Which solid rolls but does not stack?: A sphere
Cuboid: Another name for a rectangular prism
Torus: A donut shape
Ellipsoid: A stretched sphere, like a rugby ball
Frustum: A cone or pyramid with its top sliced off parallel to the base

Free flashcards from Peabody at peabody.kids/flashcards/math-3d-solids