Summary: Solving Problems With Circles and Irregular Figures
ACCESS ADDITIONAL ONLINE RESOURCES- Circumference of a Circle
- Area of a Circle
- Area of an L-shaped polygon
- Area of an L-shaped polygon with Decimals
- Perimeter Involving a Rectangle and Circle
- Area Involving a Rectangle and Circle
Key Concepts
- Problem Solving Strategy for Geometry Applications
- Read the problem and make sure you understand all the words and ideas. Draw the figure and label it with the given information.
- Identify what you are looking for.
- Name what you are looking for. Choose a variable to represent that quantity.
- Translate into an equation by writing the appropriate formula or model for the situation. Substitute in the given information.
- Solve the equation using good algebra techniques.
- Check the answer in the problem and make sure it makes sense.
- Answer the question with a complete sentence.
- Properties of Circles
- [latex]d=2r[/latex]
- Circumference: [latex]C=2\pi r[/latex] or [latex]C=\pi d[/latex]
- Area: [latex]A=\pi {r}^{2}[/latex]
Glossary
- irregular figure
- An irregular figure is a figure that is not a standard geometric shape. Its area cannot be calculated using any of the standard area formulas.
Licenses & Attributions
CC licensed content, Specific attribution
- Prealgebra. Provided by: OpenStax License: CC BY: Attribution. License terms: Download for free at http://cnx.org/contents/[email protected].