1. X marks the spot!

2. The Coordinate Plane
Lesson 1

4. Geometric quadrant with plumb bob.
A quadrant is an instrument that is used to measure angles up to 90°.

5. The coordinate plane is formed by two number lines in a plane that intersect at right angles. The point of intersection is the zero on each number line.

6. 1 -1 1 -1

7. The two number lines are called the axes.
The horizontal axis is called the x-axis.
The vertical axis is called the y-axis.

8. The two axes divide the coordinate plane into four quadrants.
The point where the axes intersect is called the origin.

9. Where am I? D Name the quadrant and the ordered pair for each point:
B.__________
C.__________
D.__________
E.__________ A C E B

10. Questions
Can someone tell me what are some of the common uses of the coordinate plane?