Lesson Support Videos
Khan Academy
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Master these skills: A, B, and C.
U9L1a. Parts of a Circle
U9L1b. Circumference
U9L1c. Find Radius or Diameter given the Circumference
U9L1d. Area
U9L1e. Find Radius or Diameter given the Area
U9L1f. Area, Circumference, and Diameter
U9L1g. Applications
Game/Practice
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Game 1 Game 2 Game 3 Game 4
IXL Skill Practice
Master these skills:
X.22 Circles: calculate area, circumference, radius, and diameter
X.31 Semicircles: calculate area, perimeter, radius, and diameter