The area of a circle can be tripled by multiplying the radius by what factor?

By 1.73.

 Because the formula for the area of a circle is ×r².

So let us say the radius for circle A is 1. so area is equal to. ×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= ×r²

So

√(A÷)

So puting and solving the equations the factor of multiplication gives us 1.73