Question

the circumference of two circles are in the ratio 2 is to 3 what is the ratio between their areas

Answer 1

Answer:

4:9

Step-by-step explanation:

circumference 1 : circumference 2 = 2:3

2(pi) r1 : 2(pi) r2=2:3

r1:r2= 2:3

areas -->

a1: a2= (pi) r1^2: (pi) r2^2

          = r1^2:r2^2

          = r1^2/r2^2

          =(r1/r2)^2

          =(2/3)^2

          =4/9

           =4:9