Introduction
Hello!
Today you will be tasked with finding the area and circumference of every day objects. Circles are all around us! Can you solve for their measurements?
Objectives
- Use the proper formulas to solve for the area and circumference of circles
- Solve for area and circumference of circles with different units of measure
- Apply knowledge of circles to solve for area of semi-circles
Task
Working in groups of four, create a poster displaying the area and circumference of five different real-world circles (sport balls, dinner plates, tires, swimming pool, etc.). Groups will present their posters to the class tomorrow! In addition to the poster, each individual group member should complete this webquest.
Posters should include:
- Formula for area and circumference of circles
- 5 different real-world circles and measurements of area and circumference
- Step-by-step work shown for area and circumference of each object
- Visuals/images of objects
- Names of group members
Process
Watch the video then answer the following questions:
1. What is the formula for area of a circle?
2. What is the formula for circumference of a circle?
3. What is the circumference and area of a circle with a radius of 5 inches? Show your work.
Before moving onto your poster presentation, practice your skills solving for area and circumference of circles: https://www.ixl.com/math/geometry/area-and-circumference-of-circles
Use https://www.google.com/ to explore different examples of real-world circles and their measurements.
What five circles will your group be finding the measurements of?
1.
2.
3.
4.
5.
Evaluation
| 4 - Excellent | 3 - Good | 2 - Needs Improvement | 1 - Poor |
| Formulas written, all work is shown and measurements are correct | Formulas written, all work is shown and measurements are mostly correct | Formulas written, some work is missing, some measurements incorrect | Formulas missing, no work is shown, only some answers are correct |
| All group members contributed to the final poster | All group members contributed to the final poster | Not all group members contributed to the final poster | Not all group members contributed to the final poster |
| Accurate representation of five different real-world circles | Accurate representation of five real-world circles | Mostly accurate representation of five real-world circles | Did not display five different real-world circles |
| Creative use of visuals, poster is organized and clearly legible | Creative use of visuals, poster is clearly legible | Works is unorganized, has visuals, mostly legible | Disorganized, parts of poster not legible, no visuals |
Conclusion
During this assignment, students practiced solving for area and circumference of circles using real-world objects. Upon completion of this assignment, students will have worked in groups to complete a poster presentation.