Question

ANIMALS NUMBER OF ANIMALS
Deer
40
Elephant 15
Giraffe 30
Reptiles 25
Tiger
10
If this data is to be represented on pie chart, then:
(a) Find the central angle of: (i) deer (ii) Giraffe
(b) Find the ratio of the central angles of Elephant to Giraffe.

Answer 1

Answer:

Total Number of animals = 40 + 15 + 30 + 25 + 10

                                           = 120

Central angle of deer = 40/120 ×360

                                     = 120°

Central angle of giraffe = 30/120 ×360

                                         = 90°

Central angle of elephant = 15/120 × 360

                                             = 45°

Ratio of central angle of elephant to giraffe = 45°/90°

                                                                            = 1/2

                                                                           = 1:2