IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => Subject Doubts => IGCSE/ GCSE => Math => Topic started by: Exam_Terrified on May 12, 2009, 10:43:21 pm

Title: Can the scale factor of sheer or stretch be negative ??
Post by: Exam_Terrified on May 12, 2009, 10:43:21 pm

So, that if my answer is negative, do i put the answer postive ??

Title: Re: Can the scale factor of sheer or stretch be negative ??
Post by: astarmathsandphysics on May 12, 2009, 10:47:20 pm

Yes it can. It moves to the other side of the centre of enlargement.

Title: Re: Can the scale factor of sheer or stretch be negative ??
Post by: Exam_Terrified on May 12, 2009, 10:52:18 pm

Quote from: astarmathsandphysics on May 12, 2009, 10:47:20 pm

Yes it can. It moves to the other side of the centre of enlargement.

no, i meant sheer or stretch, i know about enlargement.

Title: Re: Can the scale factor of sheer or stretch be negative ??
Post by: astarmathsandphysics on May 13, 2009, 01:55:44 am

When youstretch you still need a direction of stretch starting from a certain point. I think therefore that it would be negastive if stretched by the same facture in the other direction.

Title: Re: Can the scale factor of sheer or stretch be negative ??
Post by: sweetsh on May 13, 2009, 10:09:14 pm

Till now I cant handle the shear and enlargement thing in transformations thing!

Title: Re: Can the scale factor of sheer or stretch be negative ??
Post by: 7ooD on May 14, 2009, 12:01:02 am

dude chill yes it can it will be behind the invariant line if you know the transformation matrix then u can easily substitute the factor wiz costant value k