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Geometry Level 1

Find the distance between the points (7; 1; 1) and (5; -1; 2)


The answer is 3.

Mardokay Mosazghi by Mardokay Mosazghi , 22, USA

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1 solution

Mardokay Mosazghi
Aug 24, 2014

[ 7 , 1 , 1 ] , [ 5 , − 1 , 2 ] ∣ ∣ = ( 7 − 5 ) 2 + ( 1 + 1 ) 2 + ( 1 − 2 ) 2 = 4 + 4 + 1 = 9 = 3 [7,1,1],[5,-1,2]|| = \sqrt{(7-5)^2+(1+1)^2+(1-2)^2} = \sqrt{4+4+1} = \sqrt{9}=3

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