The formula of the area of a circle is :

You know that the area is 1256.
So :

Divide both sides by

:

<span> take the square root of both sides in order to obtain r :
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In short, the answer would be 20 (i have rounded).
Hope this helps !
Photon
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Answer:
the answer is 50% hehe :)
D'=(-4,2)
E'=(-1,1)
F'=(1,5)
Hope it heled.
Please note this rotation just allows you to turn (x,y) to (y,x)
Here are the rotation rules: 90° clockwise rotation: (x,y) becomes (y,-x) 90° counterclockwise rotation: (x,y) becomes (-y,x) 180° clockwise and counterclockwise rotation: (x, y) becomes (-x,-y)
Answer:
Step-by-step explanation: