D 34 Oト

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
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Make equations for the circle.
### Understanding Coordinates and Circles on a Cartesian Plane

#### Introduction
This diagram illustrates two circles plotted on a Cartesian coordinate plane, which is a standard graphical representation of algebraic equations. The circles are labeled as \( C \) and \( D \).

#### Diagram Description

1. **Cartesian Coordinate Plane**:
   - The horizontal line represents the X-axis, labeled with tick marks extending from -4 to 4.
   - The vertical line represents the Y-axis, labeled similarly from -4 to 4.
   - The origin, the point where the X and Y axes intersect, is labeled as \( O \).

2. **Circle \( D \)**:
   - Circle \( D \) is centered at approximately \((0, 3)\).
   - The radius of circle \( D \) extends from \((0, 3)\) to about \((0, 7)\) or \((0, -1)\), indicating a radius of 4 units.

3. **Circle \( C \)**:
   - Circle \( C \) is centered at approximately \((2, -2)\).
   - The radius of circle \( C \) extends from \((2, -2)\) to about \((3, -2)\) or \((1, -2)\), indicating a radius of 1 unit.

#### Analysis of the Diagram

- The circles illustrate basic properties of shapes on a Cartesian plane, such as their radii and their centers’ coordinates.
- Circle \( D \) is larger than circle \( C \) and is positioned primarily in the upper part of the graph.
- Circle \( C \) is notably smaller and located in the lower-right quadrant of the graph.

#### Conclusion
Understanding this diagram is fundamental in learning how to plot points and shapes accurately on a coordinate plane, which is essential in algebra and geometry. The centers and radii of the circles are clear, emphasizing the importance of coordinates in defining geometrical shapes.

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This educational representation aims to help students grasp the basics of plotting and analyzing circles on a Cartesian plane.
Transcribed Image Text:### Understanding Coordinates and Circles on a Cartesian Plane #### Introduction This diagram illustrates two circles plotted on a Cartesian coordinate plane, which is a standard graphical representation of algebraic equations. The circles are labeled as \( C \) and \( D \). #### Diagram Description 1. **Cartesian Coordinate Plane**: - The horizontal line represents the X-axis, labeled with tick marks extending from -4 to 4. - The vertical line represents the Y-axis, labeled similarly from -4 to 4. - The origin, the point where the X and Y axes intersect, is labeled as \( O \). 2. **Circle \( D \)**: - Circle \( D \) is centered at approximately \((0, 3)\). - The radius of circle \( D \) extends from \((0, 3)\) to about \((0, 7)\) or \((0, -1)\), indicating a radius of 4 units. 3. **Circle \( C \)**: - Circle \( C \) is centered at approximately \((2, -2)\). - The radius of circle \( C \) extends from \((2, -2)\) to about \((3, -2)\) or \((1, -2)\), indicating a radius of 1 unit. #### Analysis of the Diagram - The circles illustrate basic properties of shapes on a Cartesian plane, such as their radii and their centers’ coordinates. - Circle \( D \) is larger than circle \( C \) and is positioned primarily in the upper part of the graph. - Circle \( C \) is notably smaller and located in the lower-right quadrant of the graph. #### Conclusion Understanding this diagram is fundamental in learning how to plot points and shapes accurately on a coordinate plane, which is essential in algebra and geometry. The centers and radii of the circles are clear, emphasizing the importance of coordinates in defining geometrical shapes. --- This educational representation aims to help students grasp the basics of plotting and analyzing circles on a Cartesian plane.
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