3.2 is the answer.
If you want to learn the steps to the process
just copy and paste this "how to find the radius of a circle with an area."
I think transition, reflection, transition, and reflection.
total units of ration = 4 +7=11
so, ratio would be (4*33)/11 : (7*33)/11
12 : 21 is the answer.
Did you understand?
i)
Pythagorean's theorem: √50
j)
Pythagorean's theorem: √1/2