Type:

Curriculum

Description:

Arc LengthA radian is another unit of measurement for angles just like degrees. Radians are especially convenient for measuring angles that have to do with circles. There are  360 degrees in a circle and 90 degrees in a right angle. How many radians are in a circle and how many radians make up a right angle?Lesson, videos, exercises, and text from CK-12. Additional resources available at this site.

Subjects:

  • Mathematics > General
  • Mathematics > Geometry

Education Levels:

  • Grade 9
  • Grade 10

Keywords:

arc length radian

Language:

English

Access Privileges:

Public - Available to anyone

License Deed:

Creative Commons Attribution Non-Commercial

Collections:

Teacher Resources
Update Standards?

CCSS.Math.Practice.MP2: Common Core State Standards for Mathematics

Reason abstractly and quantitatively.

CCSS.Math.Practice.MP3: Common Core State Standards for Mathematics

Construct viable arguments and critique the reasoning of others.

CCSS.Math.Practice.MP5: Common Core State Standards for Mathematics

Use appropriate tools strategically.

CCSS.Math.Practice.MP6: Common Core State Standards for Mathematics

Attend to precision.

CCSS.Math.Content.HSG-C.B.5: Common Core State Standards for Mathematics

Derive using similarity the fact that the length of the arc intercepted by an angle is proportional to the radius, and define the radian measure of the angle as the constant of proportionality; derive the formula for the area of a sector.
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