Lesson Topic Ordered Pairs and Locating Ordered Pairs
- Slides: 8
Lesson Topic: Ordered Pairs and Locating Ordered Pairs on the Coordinate Plane Lesson Objective: I can… Use ordered pairs to name points in a grid and to locate points on a map. Identify the first number in an ordered pair as the first coordinate and the second coordinate. Extend their understanding of the coordinate plane to include all four quadrants and recognize that the axes of the coordinate plane dived the plane into four regions. Identify the origin and locate points other than the origin. Locate points in the coordinate plane that correspond to given ordered pairs.
The Order in Ordered Pairs… The first number of an ordered pair is called ______. The second number of an ordered pair is called ______.
Example 1: Using Ordered pairs to Name Locations Describe how the ordered pair is being used in your scenario. Indicate what defines the first coordinate and what defines the second coordinate in your scenario. � � � Scenario 1: The seats in a college football stadium are arranged into 210 sections, with 144 seats in each section. Your ticket to the game indicates the location of your seat using the ordered pair of numbers (123, 37). Describe the meaning of each number in the ordered pair and how you would use them to find your seat. Scenario 2: Airline pilots use measurements of longitude and latitude to determine their location and to find airports around the world. Longitude is measured as 0– 180ᵒ east or 0– 180ᵒ west of a line stretching from the North Pole to the South Pole through Greenwich, England called the prime meridian. Latitude is measured as 0– 90ᵒ north or 0– 90ᵒ south of the Earth’s Equator. A pilot has the ordered pair (90ᵒ west, 30ᵒ north). What does each number in the ordered pair describe? How would the pilot locate the airport on a map? Would there be any confusion if a pilot were given the ordered pair (90°, 30°)? Explain. Scenario 3: Each room in a school building is named by an ordered pair of numbers that indicates the number of the floor on which the room lies, followed by the sequential number of the room on the floor from the main staircase. A new student at the school is trying to get to science class in room 4– 13. Describe to the student what each number means and how she should use the number to find her
Example 2: Individual Practice Complete the handout that has been given you. Identify the points on the coordinate plane with the ordered pairs.
Key Vocabulary Words: X-axis Y-axis X-coordinate Y-coordinate Origin Coordinate pair
Exercises: Partner Work Complete the exercises with one other person at your table.
Lesson Summary: � The order of numbers in an ordered pair is important because the ordered pair should describe one location in the coordinate plane. � The first number (called the first coordinate) describes a location using the horizontal direction. � The second number (called the second coordinate) describes a location using the vertical direction. � The �� -axis and �� -axis of the coordinate plane are number lines that intersect at zero on each number line. � The axes create four quadrants in the coordinate plane. � Points in the coordinate plane lie either on an axis or in one of the four quadrants.
Evaluate your learning: 1 2 3 4 How will you “Sharpen your saw? ”
