Math Lesson View

Lesson Purpose

The purpose of this lesson is to teach students to measure and compare the ratio of circumference to diameter of circles and to identify the relationships between the parts of a circle. Also, students will form generalizations about employment opportunities such as quilting, jewelry making, manufacturing of ball bearings, car rims and wheels, sports equipment, and skilled jobs such as, plumbing, construction, machinist, etc.

Related Documents

Lesson Objectives

At the end of this lesson, students will be able to:

identify parts of a circle including diameter, radius, and circumference.

identify Pi and the ratio relationship to diameter and circumference.

justify that circumference can be derived from the diameter and Pi.

Student Target

`I can..

label the parts of a circle.

use the circumference formulas for a circle to calculate circumference.`

prove the pi by writing the circumference and diameter as a ratio.

CCR Focus Standards

Number and Ratios - Level D

Geometry - Level D

• 7.G.4

  Know the formulas for the area and circumference of a circle and use them to solve problems; give an informal derivation of the relationship between the circumference and area of a circle.

Supporting Standards

• 6.RP.3d

  Use ratio reasoning to convert measurement units; manipulate and transform units appropriately when multiplying or dividing quantities.
  

• 7.RP.2

  Recognize and represent proportional relationships between quantities.

Standards for Mathematical Practice

• MP.4

  Model with mathematics. (MP.4)

• MP.5

  Use appropriate tools strategically. (MP.5)

• MP.7

  Look for and make use of structure. (MP.7)

KYAE Employability Standards

• E.1

  E.1 Effectively contribute to a team through cooperation, leadership, and giving and accepting critical feedback to work toward a common goal.

• E.5

  E.5 Utilize resources responsibly.

• E.6

  E.6 Identify and effectively use skills and materials needed for a particular task.