In this Grade 6 Saxon Math, Course 1 lesson, students learn to distinguish between lines, line segments, and rays using precise mathematical terminology, including the roles of endpoints and arrowheads in representing each figure. The lesson also introduces linear measurement, covering units in both the U.S. Customary System (inches, feet, yards, miles) and the metric system (millimeters, centimeters, meters, kilometers). Students practice measuring line segments with inch and centimeter rulers and develop estimation skills by marking half-inch and quarter-inch intervals on a homemade tagboard ruler.
Section 1
📘 Lines, Segments, and Rays
A segment is part of a line and has two endpoints. A mathematical line has no endpoints. A ray has one endpoint.
Now that you know the definitions, you'll get hands-on practice. Next, you'll use rulers to measure the length of line segments in both inches and centimeters.
Section 2
Metric system
The metric system is an international system of measurement using units like millimeters (mm), centimeters (cm), meters (m), and kilometers (km). It is based on powers of 10, where and .
The thickness of a dime is approximately 1 millimeter.
The width of your pinky finger is about 1 centimeter.
Section 3
U.S. Customary System
The U.S. Customary System is a system of measurement that includes units like inches (in.), feet (ft), yards (yd), and miles (mi).
The length of your textbook is best measured in inches.
The height of a classroom door is best measured in feet.
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Section 1
📘 Lines, Segments, and Rays
A segment is part of a line and has two endpoints. A mathematical line has no endpoints. A ray has one endpoint.
Now that you know the definitions, you'll get hands-on practice. Next, you'll use rulers to measure the length of line segments in both inches and centimeters.
Section 2
Metric system
The metric system is an international system of measurement using units like millimeters (mm), centimeters (cm), meters (m), and kilometers (km). It is based on powers of 10, where and .
The thickness of a dime is approximately 1 millimeter.
The width of your pinky finger is about 1 centimeter.
Section 3
U.S. Customary System
The U.S. Customary System is a system of measurement that includes units like inches (in.), feet (ft), yards (yd), and miles (mi).
The length of your textbook is best measured in inches.
The height of a classroom door is best measured in feet.
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter