SOLUTION: Help. The point (2,0) is on a circle with the center (-1,4). Find the length of the radius.

Question 91634: Help.
The point (2,0) is on a circle with the center (-1,4). Find the length of the radius.
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
To find the radius, find the distance between (2,0) and (-1,4)

Start with the given distance formula
where

is the first point

and

is the second point

Plug in , , ,

Evaluate to get 3. Evaluate to get -4.

Square each value

Add

Simplify the square root (note: If you need help with simplifying the square root, check out this solver)

So the distance between (2,0) and (-1,4) is 5 units

So the radius is 5 units
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