Math Destroyer, test 1, question 7

[nyr201]

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Hey, can anyone tell me how to figure out the area here...I got the center (midpoint) but in the explanation it says the radius is the distance between (2,5) and it shows square root of 4^2 + 2^2 which is equal sqr root of 20 what I want to know where the 4 and 2 came from? Thanks.

 

[nona]

you have to take the distance from the center to one of those points for example if u took (2,5)and (6,3)
6-2=4
5-3=2
and the same numbers if u took the other point...anyone correct me!!

 

[nyr201]

thanks nona that makes sense, I just found the question to be unclear...its only test 1 tho hope to get sharper with this stuff lol. thanks again.