NCERT Exemplar Solutions
Class 6 - Mathematics - Unit 2: Geometry - Problems and Solutions
Question 77

Question. 77

How many edges, faces and vertices are there in a sphere?

Answer:

Edges: 0, Faces: 1 curved surface, Vertices: 0.

Detailed Answer with Explanation:

Step 1: Know the words

  • Face: a surface of a solid. It can be flat or curved.
  • Edge: a sharp line where two faces meet.
  • Vertex: a corner point where edges meet.

Step 2: Look at a sphere

  • A sphere is like a ball.
  • It has one curved surface all around.
  • There are no flat surfaces on a sphere.

Step 3: Decide faces, edges, vertices

  • Faces: 1 curved surface.
  • Edges: none, because there are no two faces meeting to form a line.
  • Vertices: none, because there are no edges to meet at a point.

Final answer: Edges = 0, Faces = 1 curved surface, Vertices = 0.

NCERT Exemplar Solutions Class 6 – Mathematics – Unit 2: Geometry – Problems and Solutions | Detailed Answers