All lessons › Unit 6 · Geometry and trigonometry
Circles: arcs, sectors and radians
Circle questions on the Digital SAT Math section often ask for arc length, sector area or a change from degrees to radians. All of them come from the same idea: a part of the whole circle.
This lesson teaches you to see an arc or sector as a fraction of the circle and use a proportion to find the answer. Then it explains what radians are and how to convert. Each part has a quiz, and the practice questions mix degrees and radians.
In this lesson
- Circles, arcs and sectors
- Radians
SAT Math skill: Circles
This lesson is part of the SAT Math Pass. Try Lessons 0 to 2 and Mock 1 free first.
This lesson is part of the SAT Math Pass. Try Lessons 0 to 2 and Mock 1 free first.