Basic Mathematics for College Students

Chapter 9 Summary and Review 811

CHAPTER 9 SUMMARY AND REVIEW

SECTION 9.1 Basic Geometric Figures; Angles

The word geometrycomes from the Greek words geo

(meaning Earth) and metron(meaning measure).

Geometry is based on three undefined words:point,

line,and plane.

DEFINITIONS AND CONCEPTS EXAMPLES

A

C

B

Point Line BC Plane EFG

Points are

labeled with

capital letters.

We can name a

line using any

two points on it.

Floors, walls, and

table tops are all

parts of planes.

E

F

G

STUDY SKILLS CHECKLIST

Know the Vocabulary

A large amount of vocabulary has been introduced in Chapter 9. Before taking the test, put a

checkmark in the box if you can define and draw an example of each of the given terms.

Point, line, plane

Line segment, midpoint

Ray, angle, vertex

Acute angle, obtuse angle, right angle, straight angle

Adjacent angles, vertical angles

Complementary angles, supplementary angles

Congruent segments, congruent angles

Parallel lines, perpendicular lines, a transversal

Alternate interior angles, interior angles,

corresponding angles

Polygon, triangle, quadrilateral, pentagon, hexagon,

octagon

Equilateral triangle, isosceles triangle, scalene

triangle

Acute triangle, obtuse triangle

Right triangle, hypotenuse, legs

Congruent triangles, similar triangles

Parallelogram, rectangle, square, rhombus,

trapezoid, isosceles trapezoid

Circle, arc, semicircle, radius, diameter

Rectangular solid, cube, sphere, prism, pyramid,

cylinder, cone