alleryA convex polyhedron has 9 faces and 14 vertices. How many edges does it have?
A25 edges
B23 edges
C21 edges
D19 edges
Answer & Solution
Correct answer: C. 21 edges
Euler's relation gives E = F + V − 2 = 9 + 14 − 2 = 21.
Keep practising Visualising Solid Shapes
Browse all Visualising Solid Shapes questions for ICSE Class 8, or explore more Mathematics topics.
Related questions
Match each non-polyhedron 3D solid with its curved surface feature:Match each 3D view projection with its architectural perspective:Match each 3D polyhedron with its Euler characteristics (F, V, E):Match Euler's formula components for polyhedra (F + V - E = 2):Which condition makes a rectangular cuboid a regular polyhedron?Right prism, scalene triangular base: its lateral faces are...A cube's corner cut meets only its 3 incident edges. Changes (faces, vertices, edges)?Two regular tetrahedra join at a face, apices opposite. Outer (faces, vertices, edges)?