radian measures

What is a radian?

• a central angle created when the radius is wrapped around a circle.

• a central angle created when the radius is twice as big as the arc length

• a central angle created when the radius is half as big as the arc length

• a misspelling of radius

Let's Recap!

Radian is a different unit to measure angle.

• TRUE

• FALSE

What is the radian measure of the shaded angle?

The correct way to conver 5.6 rad to degree is......

What is 0 degrees in radians? 

• 2π 
• 0
• π
•  π/2

• 150

• 240

• 270

• 300

Convert 210^o to Radians

• 7π / 6

• 21π / 10

• 5π / 6

• 9π / 4