Digital SAT Math
Lesson Plan
Radian measure and arc length relationship
Goals / Objectives
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
Derive pi radians = 180 degrees from the circumference
Explain why s = r*theta requires theta in radians
State the radian measures of the angles pi/6, pi/4, pi/3, pi/2 and order them by size
Determine whether an unlabelled angle in an SAT problem is in degrees or radians
Standards
"Solve problems using either radian measure or trigonometric ratios in the unit circle." "Convert between angle measures in degrees and radians."
Academic Vocabulary
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Materials
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Enrichment
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Anticipatory Set / Bell Work
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Modeling
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Guided Practice
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Homework
Pacing
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