CHAPTER12 Basics of Geometry ...................................................................
In This Chapter
- The vocabulary of
geometry - Exploring angle
relationships - Parallel and perpendicular
lines - Basic geometry and the
coordinate plane
Geometry begins with a few undefined terms—point, line,
and plane—and logically builds a system that describes
many physical objects. The word “geometry” means “earth
measuring,” and geometry had its beginnings in the work of
dividing land up among farmers. Doing that requires lines,
angles, and many different shapes.
In this chapter, you’ll lay the foundation on which to build
your knowledge of geometry. Starting from those undefined
terms, you’ll learn about portions of lines and combining lines
to make angles. You’ll measure and classify angles, explore
relationships between them, and bisect segments and angles.
Parallel and perpendicular lines are the building blocks of
many figures and create many angle relationships. Last of all,
you’ll take many of these ideas onto the coordinate plane and
see how they connect back to algebra.