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1. ### Geometry Questions: Rotation and Dilation?

Rotation : This is defined as movement of a point P(x,y) in a plane by an angle θ to another position...clockwise direction, then the equivalent angle in counter clockwise direction is given by (360-θ). In these rotation in counter clockwise direction, the new position of Q(x₁,y₁), is given by: (x₁...

1 Answers · Science & Mathematics · 26/05/2011

2. ### Help with rotation formulas?

We need to rotate θ degrees. Rotation matrix: [X] = [ cosθ　−sinθ ] [ x ] [Y]　 [ sinθ　　cosθ ] [ y ] [x...

2 Answers · Science & Mathematics · 01/12/2016

3. ### The coordinates after two 3d rotations .?

After the second rotation , it would be at (imagine just rotating (sqrt(2)/2, 0, 0) first) at... a bit more difficult to see, but follows but simply doing the rotation to the last two coordinates. Another thing to be careful of: the...

1 Answers · Science & Mathematics · 30/08/2008

4. ### Geometric rotations and reflections help?

...the purpose of considering the effects of rotations and reflections, it might be worthwhile to think...the point (x, y) becomes the point (y, -x) after rotation . Reflection across a vertical line -- ...

1 Answers · Science & Mathematics · 31/10/2016

5. ### Help with rotation of axes?

If A is the rotation angle of the new co-ordinate system, we can express the current x, y co-ordinates...

1 Answers · Science & Mathematics · 07/04/2014

6. ### are there numbers that repesent rotations ?

...there are many different ways to represent rotations mathematically. First, complex numbers can...for you to work out. Now, keep in mind that rotations can also be represented by matrices...

2 Answers · Science & Mathematics · 12/07/2008

7. ### precalculus rotation problem?

...and y' in the opposite direction to get x and y. Let t be the the angle of rotation . So the substitution we will be using is x = x' cos t - y...

2 Answers · Science & Mathematics · 01/06/2013

8. ### how do i get coordinates of image in geometry rotations ?

A rotation by 90° about the origin. The general rule for a rotation by 90° about the origin...the object. lets say you have a point P(2,-3). The 90 degree rotation would place it at P'(3,2) under our general rule. You will see...

1 Answers · Science & Mathematics · 14/05/2010

9. ### properties of rotation and translation in maths?

Rotation and translation are affine transformations. So if you have a set of points... will be the same as the corresponding two points in Y. So, in summary, rotations and translations are affine transformations and therefore: 1) Angles are...

2 Answers · Science & Mathematics · 14/12/2008

10. ### What are the rules for rotation ?

Since you give only one angle for each rotation , I assume you mean they are rotations ... counterclockwise (θ=180º) (180º rotation is the same in either direction): (x,y) → (-x, -y) ...

2 Answers · Science & Mathematics · 09/11/2012