LECTURE 3.The simplest problem of analytic geometry. Equations of a straight line on a plane.
LECTURE PLAN:
1. The simplest problem of analytic geometry
2. Equations of a straight line on a plane
Analytic Geometry in the Plane
Consider the Cartesian rectangular coordinate system in the plane. Taking the projection of any point Ì_{1} on the x and y coordinate we obtain two numbers x=a_{1} and y=b_{1}. Take two numbers a_{2} and b_{2} plot a_{2 }on the xaxis and b_{2} on the yaxis . Having drawn two straight lines parallel to the coordinate axes through these points we find obtain a point M_{2} in their intersection.
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 Thus, there is a one–to–one correspondence between points in the plane and pairs of numbers.

Date: 20150102; view: 1215
