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GeometryB Topic 12 Map

Lesson 1

Circumference

Using circumference formula to find the circumference, radius or diameter of a circle

Lesson 2

Use the arc length formula and principle to find the arc length, arc measure, radius, diameter, or circumference of a circle

Lesson 3

Use the area formula to find the area, radius, or diameter of a circle

Lesson 4

Use the sector area formula to find the sector area, total area, radius, or diameter of a circle

Lesson 5

Spotlight on ACT questions using the circumference, area, arc length, and sector area formulas

+ knowledge check

+ knowledge check

+ knowledge check

+ knowledge check

+ knowledge check

Arc Length

Area of Circles

Area of Sectors

ACT Spotlight

Essential Question: What is the relationship between the radius, diameter, circumference, and area of a circle?

OAS Standard(s) Covered: G.C.1.1 Apply the properties of circles to solve problems involving circumference and area, using approximate values and in terms of pi, using algebraic and logical reasoning.

Informal Knowledge Check Post-Lesson: If we know the circumference, how can we use that to find the diameter of a circle?

Informal Knowledge Check Post-Lesson: How does arc length compare to circumference? How are the formulas similar?

Informal Knowledge Check Post-Lesson: What is the difference between an exact and approximate answer? How do you find each?

Informal Knowledge Check Post-Lesson: Compare and contrast the area and sector area formulas.

Informal Knowledge Check Post-Lesson: How can we remember the sector area and arc length formulas without memorizing any more formulas?