Unit 4: Introductory Review

Unit 4: Introduction of Radians

By Stephanie Balbaneda

By the end of the day, students will be able to ​

​simplify and convert radians to degrees and degrees to radians

Subject | Subject

Some text here about the topic of discussion

What are radians?

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Multiple Choice

Name the circle part shown in red

• Diameter

• Circumference

• Radius

• Perimeter

Multiple Choice

What is being represented (black) in the image?

• Diameter

• Chord

• Radius

• Concentric Circles

Radians

Pi & Radians

Radian Conversion

You can use thei proportion to solve for either degrees(D) or radians(R). plug in your know value (R or D) and solve for the other

Converting Hints

• If you convert from Degrees, pi will show up in your answer for radians....

• Leave Pi as a symbol in radians! (unless you need a decimal answer)

• If you converting from Radians, pi will cancel out

Multiple Choice

Convert 35π / 18 radians into degrees

• 350^o

• 340^o

• 355^o

• 345⁰

Multiple Select

Which are true about radians?

• 1 Radian is the angle where arc and radius are equal

• There are 2pi radians in a circle

• 1 radian is about 57 degrees

• A circumference is about 6.3 radians of arc