Question

show that the point A(0,0) B(6,0) D(9,4) and C(3,4) are the vertices of a parallelogram taken in order​

Answer 1

(i) Let point(0,7,−10),(1,6,−6) and (4,9,−6) be denoted by A,B and C respectively

AB=

(1−0)

2

+(6−7)

2

+(−6+10)

2

=

(1)

2

+(−1)

2

+(4)

2

=

1+1+16

=

18

Answer 2

dont consider the distance between diagonals step

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