Page 238 - ABCTE Study Guide_Neat
P. 238
Representational Systems
Lesson Objective
In this lesson you will learn to perform a variety of computations involving basic geometric figures and their
parts.
Previously Covered
The slope of a line describes the steepness of the line. Two lines are parallel if they have the same slope.
Two lines are perpendicular if the slope of each is the negative reciprocal of the slope of the other.
A parallelogram is a quadrilateral whose opposite sides are parallel. A rectangle is a parallelogram with
four right angles.
The Coordinate Plane
A coordinate plane is formed by two perpendicular number lines that intersect at their points of origin.
The location of any point in the coordinate plane is given by an ordered pair of the form (x,y). It’s called
ordered, because the order matters: the first value in the pair is the x-coordinate of the point and the
second value is the y-coordinate.
The figure below shows a square in the coordinate plane.
Coordinate Plane
