# Question #b16d4

##### 1 Answer

see below

#### Explanation:

i dont see the point of this but i can blag it for you

we start with the definition of curvature which I lift from here

and for circle radius R

reverting to more economical prime notation and equating

so

differentiate

cancel terms

now from inverting

So

pop

cancel a few terms

can't guarantee that's the most efficient, it just worked out first time