CK12 - Geometry

A matrixcan representthe coordinatesof the verticesof a polygon.

is is is

Eachrow representsthe coordinatesof one of the vertices.

Example 2

Whatare the coordinatesof point

in the imageabove?

The -coordinateof point is ; the -coordinateis.

MatrixAddition

Matriceshavetheir own versionof arithmetic.To add two matrices,add the elementsin correspondingpo-
sitionsin the matrices.

• Add the elementsin row column. Add the elementsin row column. And so on.


• Placeeach sum in the correspondingpositionin anew matrix, whichis thesumof the originaltwo matrices.


• The sum matrixhas the samedimensionsas the matricesbeingadded.


• To add two matrices,they musthavethe samedimensions.

Example 3

The companyin example1 has a westernregionas well as an easternregion.The westernregionalso
has two warehouseswherethey storethe threemodelsof their product.The