CK12 - Geometry

If is a polygonmatrix,then the matrixfor the imageof the polygonin a rotationis the product

. The LessonExercisesincludeexplorationof this matrixfor a rotation.

Example 1

Whatare the coordinatesof the verticesof in a rotationof?

Markaxesby s is , is , is

The matrixbelowrepresentsthe verticesof the triangle.

The matrixfor the imageof is the product:

The verticesof are and