## waheguru Group Title The lenght from the center of teh circle to a point on the circle is r = square root of 40 what is the length of the radius the answer is 2 and squareroot 10? one year ago one year ago

1. wio Group Title

$\sqrt{40} = \sqrt{4}\times\sqrt{10}=2\sqrt{10}$

2. waheguru Group Title

oh THANK YOU

3. waheguru Group Title

:)

4. waheguru Group Title

but the first number has to be a perfec square right?

5. wio Group Title

Yes

6. wio Group Title

You can pull out any perfect squares.

7. wio Group Title

Since $$40=2\cdot 2\cdot 2\cdot 5$$ you can pull out the $$2\cdot 2$$, and he $$2\cdot 5$$ remains inside.