Location - Plot Points on a Cartesian Plane . The Cartesian Plane is a co-ordinate system for locating and labelling unique points on a plane (flat/2D) surface. Co-ordinates indicate the distance from the origin, which is the starting point of each axis, in each direction. . Invention of this system for locating a point in 2D space is attributed to Rene Descartes (also known as Cartesius), a French philosopher, scientist and mathematician who lived in the 17thCentury AD. There is a legend that D

214K views · 31 reactions | Geometric reflections in the coordinate plane. Here we reflect a quadrilateral over the x-axis, y-axis and over y=x. This same process will work to reflect any geometric shape over any line of symmetry, even linear equations. Link to full video and link to download the template from my Google Drive in comments. | Scaffolded Math and Science | Facebook