Question

(a) How many edges are there in a cylinder?

(b) How many vertices are there in a sphere?

(c) Identify the figure given below?

[3 MARKS]

Answer 1

Each part: 1 Mark

(a) Edge is defined as the line segment where two faces of a polyhedron meet. A cylinder has no such line segments. Therefore, it has 0 edges.

(b) There are no vertices in a sphere as there are no sharp corners in a sphere.

(c) The figure which has all the three dimensions, viz. length, breadth and height, equal is called a cube. Therefore, the given figure is a cube.