LEARN NC

K–12 teaching and learning · from the UNC School of Education

Goal 3

Geometry -The learner will understand and use properties and relationships of geometric figures in the coordinate plane.

Objective 3.02

Identify the radius, diameter, chord, center, and circumference of a circle; determine the relationships among them.

Resources aligned to this objective

Flying saucers: Circles
Students will apply what they have learned about circles and finding averages with this lesson. This lesson should be broken up into 3 class periods of an hour for each class.
Format: lesson plan (grade 5 Mathematics)
By Amy Romagnuolo.
Creating and understanding circles and their parts
This lesson will offer a hands-on opportunity to explore and construct circles. Students will develop a definition for identifying the parts of a circle such as the center, radius, diameter, chord, and circumference. Students will use compasses and rulers in constructing these parts of a circle.
Format: lesson plan (grade 6 Mathematics)
By Patricia Tingen.

Resources on the web

Square circles
This Illuminations lesson allows students to use a variety of units when measuring the side length and perimeter of squares, as well as the diameter and circumference of circles. (Learn more)
Format: lesson plan (grade 6–8 Mathematics)
Provided by: National Council of Teachers of Mathematics
Sizing up the solar system
Students use the internet to investigate and design various models of size and distance related to the solar system. (Learn more)
Format: lesson plan (grade 6 Mathematics and Science)
Provided by: American Association for the Advancement of Science
The ratio of circumference to diameter
In this lesson, one of a multi-part unit from Illuminations, students measure the circumference and diameter of circular objects. They calculate the ratio of circumference to diameter for each object in an attempt to identify the value of pi and the circumference. (Learn more)
Format: lesson plan (grade 6–7 Mathematics)
Provided by: National Council of Teachers of Mathematics