* If the hour hand of a clock is turned counterclockwise from 2 pm to 9 am, through how many degrees will it have turned?
1 answer:
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Answer : B
the distance between the points (4,3) and (2,-1)
We apply distance formula
(x1,y1) is (4,3)
(x2,y2) is (2,1)
d^2 = 4+16 = 20
Take square root on both sides
So
the distance between the points (4,3) and (2,-1) is 2sqrt(5)