Previously, you
• used the order of operations. • used variables and • •
expressions to represent situations. located points in the coordinate plane. solved equations.
Key Vocabulary/Vocabulario angle
ángulo
area
área
coordinate plane
plano cartesiano
line
línea
perimeter
perímetro
plane
plano
point
punto
transformation
transformación
undefined term
término indefinido
You will study
• applying basic facts about
Vocabulary Connections
•
To become familiar with some of the vocabulary terms in the chapter, consider the following. You may refer to the chapter, the glossary, or a dictionary if you like.
• •
points, lines, planes, segments, and angles. measuring and constructing segments and angles. using formulas to find distance and the coordinates of a midpoint. identifying reflections, rotations, and translations.
1. A definition is a statement that gives the meaning of a word or phrase. What do you think the phrase undefined term means? 2. Coordinates are numbers used to describe a location. A plane is a flat surface. How can you use these meanings to understand the term coordinate plane ?
You can use the skills learned in this chapter
• to find distances between •
•
4
Chapter 1
cities. to determine how much material is needed to make a rectangular or triangular object. in classes such as Biology, when you learn about gene mapping and in physics, when you study angles formed by light waves that bounce off objects.
3. A point is often represented by a dot. What real-world items could represent points? 4. Trans- is a prefix that means “across,” as in movement. A form is a shape. How can you use these meanings to understand the term transformation ?