Digital SAT Math
Lesson Plan
Arc length and sector area
Goals / Objectives
Solve for an arc length, a sector area, a central angle, or a radius from the others, with the angle in degrees or in radians, including multi-step problems
Calculate arc length using (theta/360) * 2pir (degrees) and s = r*theta (radians)
Calculate the area of a sector using (theta/360) * pi*r^2 (degrees) and A = (1/2)r^2theta (radians)
Convert an angle with pi radians = 180° when an arc or sector problem requires it
Standards
"Use definitions, properties, and theorems relating to circles and parts of circles such as radii, diameters, tangents, angles, arc lengths, and sector areas to solve problems." "Solve problems using either radian measure or trigonometric ratios in the unit circle." "Convert between angle measures in degrees and radians."
Academic Vocabulary
Not in our source material
Materials
Remediation
Enrichment
This lesson’s brief has no Differentiation
Accommodations
Not in our source material
Anticipatory Set / Bell Work
Modeling
Check for Understanding
This lesson’s brief has no Formative Assessment or Assessment Ideas
Guided Practice
Independent Practice
Homework
Pacing
This lesson’s brief has no Pacing