Page 643 - Basic College Mathematics with Early Integers

9 Geometry

9.1 Lines and Angles
9.2 Plane Figures and Solids
9.3 Perimeter
9.4 Area
9.5 Volume and Surface Area
Integrated Review—Geometry
Concepts
The word geometry is formed from the Greek words geo, meaning Earth, and metron, meaning measure.
9.6 Congruent and Similar Triangles
Geometry literally means to measure the Earth. In this chapter we learn about various geometric figures and their
properties such as perimeter, area, and volume. Knowledge of geometry can help us solve practical problems in
real-life situations. For instance, knowing certain measures of a circular swimming pool allows us to calculate how
much water it can hold.
Vocabulary Check
Chapter Highlights
ou may have seen Shaun White win the men’s snowboarding halfpipe competi-
Chapter Review tion during the 2010 Winter Olympics, but what is a halfpipe?
Chapter Test YA halfpipe is a semicircular ditch with a flat bottom that is usually constructed
on a downward slope.The depth of the ditch can be between 8 and 22 feet.As you
Cumulative Review
see below, there are many measurements taken to ensure a safe and approved half-
pipe. In addition, the snow must be carefully prepared and packed.
Throughout this chapter, we work with lines, angles, circumferences, and other
geometric concepts that give us an appreciation of the work that goes into con-
structing a halfpipe.
FIS Snowboard World Cup Half-Pipe Dimensions
for 18 Foot (5.4 m) Pipe

17.5–18 m 6–7.5 m
0.2 m

5.4 m
100–150 m

dirt wall angle:
10 m
at least 45

at least 5.5 m
16–17
at least 9 m
15 m

620