Posted by **rita** on Friday, May 23, 2008 at 9:57am.

the vertices of triangle DEF are D(5,12)and E(2,7) and F(8,4)

Triangle DEF undergoes an enlargement with the centre ,O, and scale factors k.Its image is D`E`F` where D(5,12)arrow D`(7.5,18)

a)How do i detremine the value of k

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