the areas grow as the square of the ratio of the radii
so, the radii and circumferences grow as the square root of the ratio of the areas, which is
3π / 75π = 1/25
So, the radii and circumferences have ratio 1/5
8/72 = 1/9
sides have ratio 1/3
The same logic applies to trapezoids.
please help me!!!
1. What is the ratio of the radii of two circles with area = 3 π square units and 75π square units?
b. What is the ratio of their circumferences?
2. What is the ratio of the sides of two trapezoids with area = 8 square units and 72 square units?
b. What is the ratio of their perimeters?
1 answer
1 answer