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Calculate arc lengths and sector areas

Geometry and measures • Mensuration and calculation

Key concepts

What you'll likely be quizzed about

  • Arc length is the distance along the curved line of a circle segment.
  • To calculate arc length, the formula is: arc length = (central angle/360) × circumference.
  • The circumference of a circle is derived from the formula: circumference = 2 × π × radius.
  • Thus, knowing the radius and angle enables accurate arc length determination.

Flashcards

Test your knowledge with interactive flashcards

How do you find the circumference of a circle?

Click to reveal answer

Circumference = 2 × π × radius.

Key notes

Important points to keep in mind

Use radians for precise calculations when needed.

Ensure units match when calculating areas and lengths.

Always confirm angle measurements before calculating.

Write down formulas for quick reference.

Visualize problems with diagrams for better understanding.

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