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Lesson Plan
Curated OER

Understanding Fundamental Trigonometric Identities

For Teachers 9th - 12th
Young scholars are introduced to the basic trigonometric identities. Using a diagram, they discover why the parts of the unit circle as named as they are and use equations to finalize the Pythagorean trigonometric identities. They also...
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Lesson Plan
Curated OER

Exploring Trigonometric Ratios

For Teachers 10th - 12th
Learners calculate the different ratios using a right triangle. In this trigonometry activity, students identify the sine, cosine and tangent of each side. They find the missing angles using the different ratios.
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Lesson Plan
Curated OER

Exploring Trigonometric Functions

For Teachers 9th - 12th
Students are introduced to the characteristics of trigonometric functions. In groups, they analyze graphs of sine and cosine to determine the lengths of a triangle. They compare and contrast the graphical and numerical characteristics...
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Worksheet
Curated OER

Ten Trigonometric Review Problems - Calculator Required

For Students 11th - Higher Ed
In this trigonometry review worksheet, students convert between radians and degrees, sketch angles, evaluate trig. functions, solve for missing angles, and find the functions that satisfy the given conditions.
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Worksheet
Curated OER

Using Slope Angles

For Students 10th
In this geometry worksheet, 10th graders use right triangle trigonometry to solve problems involving angle of elevation or depression. The one page worksheet contains eleven problems. Answers are not provided. 
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Worksheet
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Curated OER

Radian Measure

For Students 11th - 12th
In this Algebra II/Pre-calculus worksheet, students explore radian measure of an angle and convert between degree and radian measure. The seven page worksheet contains explanation, examples, and nineteen multi-part problems. Answers are...
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Worksheet
Curated OER

Linear - Quadratic Systems

For Students 10th - 11th
In this quadratic system instructional activity, students solve systems of linear equations. This one-page instructional activity contains two story problems where students write their own system of equations and then solve. The...
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Lesson Plan
Curated OER

River Width

For Teachers 6th - 8th
Learners determine the level of accuracy needed for computations involving measurements and irrational numbers. They use the correct number of digits in computation to achieve an appropriate unit or level of accuracy when solving...
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Worksheet
Curated OER

Investigating Transformations

For Students 11th - 12th
In this trigonometry worksheet, students investigate the transformations that can occur to the basic trigonometric functions. The thirteen page worksheet contains explanation, examples, and forty-seven questions. Answers are not included.
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Lesson Plan
Curated OER

Trigonometric Functions of Special Angles

For Teachers 9th - 12th
Students explore the concept of the six trigonometric functions, places where the functions can be utilized, and apply these functions to several electrical application problems.
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Lesson Plan
Curated OER

Measuring Angles

For Teachers 3rd
Third graders describe an amount of turn from a particular position to another using the 'circular' benchmarks of 0, ++, ++, ++, and full turn. Estimation language such as 'just about', 'between', 'not quite', 'just over', and similar...
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Lesson Plan
Curated OER

The Mathematics of Space and Place

For Teachers 9th - 10th
Pupils investigate the measurements and geometry of the school grounds. They conduct inquiry while measuring the campus and some of the city blocks. Then students draw a map to scale and categorize property types using a pie graph.