a. The continents that are approximately the same size are Europe and Austrailia.
b. A continent that is about one-half the size of Asia is South America.
c. The continents which together make up about half of the world's land mass are Asia and Africa.
In Mathematics and Euclidean Geometry, a circle graph is sometimes referred to as a pie chart and it is a type of graph that is used for the graphical representation of the proportional relationship between each part to a whole, especially by dividing a circle into various sectors or sections.
Part a.
By critically observing the circle graph shown above, we can logically deduce that the continents that are approximately the same size are Europe and Austrailia;
Europe = 7%.
Austrailia = 6%.
Part b.
Based on the circle graph, a continent that is about one-half the size of Asia is South America;
Asia = 29%
One-half of Asia = 1/2 × 29%
One-half of Asia = 14%
South America = 12% ≈ 14%
Part c.
The continents which together make up about half of the world's land mass are Asia and Africa;
Half of the world's land mass = 50%.
Asia + Africa = 29% + 20%
Asia + Africa = 49% ≈ 50%.