The area of a circle C varies directly as the square of its radius r. What is the ratio of the area of a circle whose radius is 6 cm to the area of a circle whose radius is 12 cm?
with explanation please...
with explanation please...
Add an Answer
More Questions From This User See All
Answers & Comments
Answer:
1:4
Step-by-step explanation:
C = r²
capital 'c' to represent the area of the circle.
2 circles:
first find the area of both circles:
1. C = r²
C = 6²
C = 36cm
3. C = r²
C = 12²
C = 144cm
ratio:
36:144
convert to lowest terms -
1:4