Page No 163:
Question 1:
Look at the given map of a city.
Answer the following.
(a) Colour the map as follows: Blue − water plant, red − fire station, orange − library, yellow − schools, green − park, pink − college, purple − hospital, brown − cemetery.
(b) Mark a green ‘X’ at the intersection of Road ‘C’ and Nehru Road, Green ‘Y’ at the intersection of Gandhi Road and Road A.
(c) In red, draw a short street route from library to the bus depot.
(d) Which is further east, the city park or the market?
(e) Which is further south, the Primary School or the Sr. Secondary School?
page No 166:
Question 1:
Can a polyhedron have for its faces
(i) 3 triangles?
(ii) 4 triangles?
(iii) a square and four triangles?
Page No 166:
Question 2:
Is it possible to have a polyhedron with any given number of faces? (Hint: Think of a pyramid).
Page No 166:
Question 4:
(i) How are prisms and cylinders alike?
(ii) How are pyramids and cones alike?
Page No 167:
Question 7:
Using Euler’s formula, find the unknown.
Faces | ? | 5 | 20 |
Vertices | 6 | ? | 12 |
Edges | 12 | 9 | ? |
