By 1.73.
Because the formula for the area of a circle is [tex] \pi [/tex]×r².
So let us say the radius for circle A is 1. so area is equal to. [tex] \pi [/tex]×2²
which is equal to 12.56
Now you need to triple the area, so if i am in the right path you would multiply area of circle A 3 times leaving you with 37.699
Now, we make use of the equation solving skills.
The way to find the radius is.
A= [tex] \pi [/tex]×r²
So
√(A÷[tex] \pi [/tex])
So puting and solving the equations the factor of multiplication gives us 1.73
