Thursday

August 21, 2014

August 21, 2014

Posted by **Anonymous** on Thursday, January 1, 2009 at 9:23pm.

- math -
**Reiny**, Thursday, January 1, 2009 at 11:44pmSeveral questions are gnawing at me as I read your question.

1. What form does your dilation take?

you could keep one point in its present position and simply double the length of each side.

e.g. keep B(-2,3) but move A to A1(4,-1) so that A becomes the midpoint of BA1.

I would be relatively easy to work your way around in the same way for the other sides.

Of course you could do this again by keeping point A constant, etc.

Another way would be to find the intersection of the two diagonals, call it F, and then joining F to the original vertices and extending FA,FB,FC,and FD its own length.

2. Some of this can be done with vector geometry, but do you know how to work with vectors?

3. I am not sure what you mean by a "vertex matrix".

4. What course level is this? Is it simply analytical geometry?

- math -
**Anonymous**, Friday, January 2, 2009 at 12:02am1. not sure

2. Don't remember but hte book says to do it with matrices.

3. My book says a vertex matrix is a matrix into which the coordinates of a polygon's matrices are placed.

4. Algebra 2 - Transformations with matrices

- math -
**Reiny**, Friday, January 2, 2009 at 12:15amok, then keeping B as it is, I found

A1(4,-1)

C1(-6,-5)

D1(6,-9)

each of my new sides are twice as long as the old ones, but the new lines are parallel to the original

e.g. AD is parallel to A1D1

- math -
**Anonymous**, Friday, January 2, 2009 at 12:21amYes, but how would I represent this in a matrix?

**Related Questions**

Geometry - The coordinates of the vertices of quadrilateral ABCD are A (-8, 8...

Geometry - the verticies of a quadrilateral are A(-4,-3), B(2,-3), C(4,-6) and D...

Geometry - The coordinates of the vertices of a quadrilateral are R(-1,3) S(3,3...

math - the scale of two similar quadrilaterals is 1:2. The perimeter of the ...

Math - The scale of two similar quadrilaterals is 1:3. The perimeter of the ...

Geometry - Determine whether the polygons with the given vertices are similar. ...

Geometry MATH - the vertices of a quadrilateral are A(-4,-3), B(2,-3), C(4,-6) ...

algbra - a parallelogram is a quadrilateral whose opposite sides are parallel. ...

geometry - What is the most precise name for quadrilateral ABCD with vertices A...

St francis - Abcd is a quadrilateral such that AB = bc, ad= 1/4am. If bc 12 what...