Question 18
The diagram shows two similar vases, A and B
Diagram NOT accurately drawn
The height of vase A is 30 cm
The height of vase B is 12 cm
Given that
surface area of vase A - surface area of vase
find the surface area of vase A
Edexcel IGCSE Math A Higher 4.11.HA area ratios in similar figures
Practise similar-area questions by finding the linear scale factor from heights, squaring it and using the given total or difference of areas.
How this is tested
- Square the linear scale factor before comparing surface areas of similar figures.
- Use a given sum or difference of surface areas to calculate one missing area.