Lesson Plan
Curated OER

NIGHT AND DAY: DAILY CYCLES IN SOLAR RADIATION

For Teachers 9th - 12th
Students examine how Earth's rotation causes daily cycles in solar energy using a microset of satellite data to investigate the Earth's daily radiation budget and locating map locations using latitude and longitude coordinates.
Worksheet
Center for Innovation in Mathematics Teaching

Trigonometry

For Students 9th - 12th Standards
This unit covers the basic trigonometry including understanding radians, how to convert between radians and degrees, the area of a circle subtended by an angle, basic properties and graphs of sine, cosine, tangent, and solving...
Lesson Plan
Alabama Learning Exchange

Unit Circle: Special Angles—Just Know One

For Students 9th - 12th Standards
It's all about the patterns! Young scholars learn that the unit circle repeats itself in all four quadrants. Using these patterns, they evaluate the sine, cosine, and tangent of special angles.
Lesson Plan
Curated OER

Arc Length Lesson

For Teachers 9th - 11th
Students find the length of the arc of a circle. For this geometry lesson, students calculate the length of an arc and find the measure of the central angle given the length of the arc. They convert between linear and angular speed. They...
Worksheet
Curated OER

Further Trigonometry

For Students 11th - Higher Ed
In this trigonometry worksheet, students solve for trigonometric functions. They convert between radians and angles using the properties of sine, cosine and tangent. There are 30 problems on this handout.
Lesson Plan
Curated OER

Arc Measurement Based on The Measurement of a Central Angle

For Teachers 9th - 10th
Students define keywords that are important to solve problems. In this geometry activity, students find the arc length and angle of a circle. They convert between radians and degrees.
Lesson Plan
Curated OER

Measurement of a Central Angle

For Teachers 9th - 11th
Students calculate the measurement of a central angle. In this geometry lesson, students identify properties of circles. They use Cabri software to create and analyze graphs.
Worksheet
Curated OER

Defining the Circular Functions

For Students 10th - 12th
In this calculus worksheet, students solve values involving trigs and the unit circle. They identify graphs of sine, cosine and tangents. They solve for angles using the unit circle and the calculator.
Handout
Other

Teachers Choice: How to Convert Degrees to Radians or Radians to Degrees

For Students 9th - 10th Standards
This site offers a discussion on radian measure. The site offers pictures and explanations to clarify the formulas given. (Note: The free download at the end of the page will not work in archived version of site.)
Activity
Interactive Mathematics

Interactive Mathematics: Angles Degrees and Radians

For Students 9th - 10th Standards
Angles are key to Trigonometry. Learn definitions of the parts of an angle, degrees, and radians, identify the standard position of an angle, convert between radians and degrees, and more.
Lesson Plan
Google

Google for Education: Degrees and Radians

For Teachers 9th - 10th
Students label key points on the unit circle in both radians and degrees. They count their way around the circle in 30-degree increments, and then again in increments of radians. Finally, students go through a similar process for angles...
Handout
Northeast Parallel Architectures Center, Syracuse University

Npac Reu Program: Conversion

For Students 9th - 10th
This site displays the formulas for the simple conversions of degrees to radians and radians to degrees. Near the bottom of the page there are examples of these conversions.
Unknown Type
Khan Academy

Khan Academy: Radians and Degrees

For Students 9th - 10th Standards
Convert angle measures given in degrees to radians and vice versa. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Handout
Windstream

Ojk's Precalculus Study Page: Measurement of Angles

For Students 9th - 10th Standards
An introduction to radian measurement, including converting between radians and degrees. Includes several examples and lots of pictures.
Handout
Purple Math

Purplemath: Converting Between Radians and Degrees

For Students 9th - 10th Standards
Describes degrees and radians with respect to angles, the reason for the invention and use of radians, and how to convert between radians and degrees.
Unknown Type
Khan Academy

Khan Academy: Radians & Degrees

For Students 9th - 10th Standards
Convert angle measures given in degrees to radians and vice versa.
Activity
Interactive Mathematics

Interactive Mathematics: Radians

For Students 9th - 10th
Learn the definition of radians and how to calculate trig ratios using radian measures. Examples are provided showing how to convert from degrees to radians.
Unknown Type
Savvas Learning

Pearson Education: Radian and Degree Angle Measures [Pdf]

For Students 9th - 10th Standards
This resource details how to convert between radians and degrees with worked examples. It also looks at special radian measures that are used often.
Interactive
Calculator Soup

Calculator Soup: Angle Conversion Calculator

For Students 9th - 10th
Convert units of angles by entering the value to convert and the from and to units.