Sir Circumference and the First Round Table, by Cindy Neuschwander
Students will experiment with rearranging shapes to better visualize the Congruence and relationship of geometric shapes.
Lesson Created by:
Kathy Buyle, Susan B. Anthony Middle School, Manhattan, KS
Materials Book: Sir Circumference, rulers, paper, pencils, scissors
1. Launching the lesson (engage):
- Read the story.
- Go back through the story and discuss the vocabulary pointing out the use of geometric terms.
- Discuss the progression of the logic that was used to create the round table in the end.
2. Developing the lesson
- Introduce each shape of the table as it appears in the story, starting with the rectangle. As the shape is introduced, the students will draw that shape to a predetermined scale on their papers and cut it out.
- Next, create the square table using the rectangle piece.
- Next, create the parallelogram by cutting and rearranging the pieces. At this point a discussion of parallelograms could be done.
- The next shape to create is a triangular table, which didn’t work so the octagonal table will be created.
- The oval table will need to be cut from another piece of paper using the octagon as a guide for length of the oval.
- Finally, a circular table seems to be the solution. Students cut out a circle using a compass or a circular shape.
- Using the circle that the students have created, discuss the characteristics of a circle: diameter, radius, and circumference.
- The students will measure their circles to determine the diameter, radius and circumference.
Use the circle to actually measure the circumference by rolling it along a ruler and then discuss the idea of pi.