RD Sharma Solutions Class 7 Chapter 19 Exercise 19.1
Q1: Complete the following table and verify Euler’s formula in each case.
Hence Euler’s formula is verified for these figures.
Q2: Give three examples from our daily life which are in the form of
(i) a cone
(ii) a sphere
(iii) a cuboid
(iv) a cylinder
(v) a pyramid.
(i) Cone: Ice-cream cone, clown cap, rocket
(ii) Sphere: Football, a round apple, an orange
(iii) Cuboid: book, brick, duster
(iv) Cylinder : circular pipe, glass, circular pole
(v) Christmas decorations, cheese and patio umbrellas.