Question

Define the following terms: [3 MARKS]

a. Vertices

b. Edges

c. Faces

Answer 1

Definition: 1 Mark each

a. A vertex (plural: vertices) is a point where two or more straight lines meet. E.g. The 8 corners of the cube are its vertices.

b. An edge is a line segment that joins two vertices. E.g. The 12 line segments that form the skeleton of the cube are its edges.

c. A face is any of the individual surfaces of a solid object. E.g. The 6 flat square surfaces of the cube are its faces.