Activity
Shodor Education Foundation

Shodor Interactivate: Angles

For Students 6th - 8th Standards
The activity allows students to practice identifying different types of angles. An interactive activity and teacher resources are included.
Handout
University of Georgia

University of Georgia: Inter Math: Exterior Angles

For Students 9th - 10th
Intermath Dictionary's site defines terms relating to angles, gives examples, and offers interactive exercises.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F Tf Trigonometric Ratios and the Pythagorean Theorem

For Teachers 9th - 10th Standards
The purpose of this task is to use the Pythagorean Theorem to establish a fundamental trigonometric identity for an acute angle. The reasoning behind this identity is then applied to calculate a cosine for a given obtuse angle. Aligns...

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