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Learning Goal

‹5 of 5 in this skill_area

Radian measure and arc length relationship

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Lesson Plan · Guided Notes · Exit Ticket · Re-teach · Homework

"Solve problems using either radian measure or trigonometric ratios in the unit circle." "Convert between angle measures in degrees and radians."

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"Solve problems using either radian measure or trigonometric ratios in the unit circle."
"Convert between angle measures in degrees and radians."

What you'll learn

  1. Define one radian as the central angle that subtends an arc equal in length to the radius, so that theta = s/r is a unitless ratio independent of the circle's size
  2. Derive pi radians = 180 degrees from the circumference
  3. Explain why s = r*theta requires theta in radians
  4. State the radian measures of the angles pi/6, pi/4, pi/3, pi/2 and order them by size
  5. Determine whether an unlabelled angle in an SAT problem is in degrees or radians

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