Question

The ratio of the radii of two circles is 3: 4. Find the ratio of their areas.​

Answer 1

Answer:

Answer:

1. 9:16

2. 4:9

Step-by-step explanation:

1 ratio of r = 3:4

ratio of there areas = πr²/πR²

= r²/R²

= 3²/4²= 9/16

2 . 2πr/2πR = r/R = 2/3

πr²/πR² = r/R = 2/3

Answer 2

Step-by-step explanation:

So, r1:r2=3:4

So, r1:r2=3:4 And for area we have a1,a2 be the area of circle1 and circle2 respectively

So, r1:r2=3:4 And for area we have a1,a2 be the area of circle1 and circle2 respectivelySo the ratio will be a1:a2=π(r1)2:π(r2)2

So, r1:r2=3:4 And for area we have a1,a2 be the area of circle1 and circle2 respectivelySo the ratio will be a1:a2=π(r1)2:π(r2)2 π will cancel out and ratio will be

So, r1:r2=3:4 And for area we have a1,a2 be the area of circle1 and circle2 respectivelySo the ratio will be a1:a2=π(r1)2:π(r2)2 π will cancel out and ratio will bea1:a2=(3)2:(4)2

So, r1:r2=3:4 And for area we have a1,a2 be the area of circle1 and circle2 respectivelySo the ratio will be a1:a2=π(r1)2:π(r2)2 π will cancel out and ratio will bea1:a2=(3)2:(4)2 a1:a2=9:16