The trapezoidbelowis reflectedin the line.Whatare the coordinatesof the verticesof the imageof the trapezoid?- Write a polygonmatrixfor the coordinatesof the verticesof the trapezoid.
- Multiplythe polygonmatrixby (on the right).
- Interpretthe productmatrix.
The verticesof the imageof the trapezoidare , and.LessonSummary
A pointor set of points,suchas a polygon,can be reflectedin a line. In this lessonwe focusedon reflections
in threeimportantlines:the -axis,the -axis,and the line.
Matricescan be multiplied.Matrixmultiplicationis a row-by-columnoperation.Matrixmultiplicationis not
commutative,and not all matricescan evenbe multiplied.