# Teaching Resources for Geometry

1. uses interactive activities to prove the Pythagorean Theorem.
2. Computing Pi- The Greek mathematician Archimedes approximated pi by inscribing and circumscribing polygons about a circle and calculating their perimeters. Similarly, the value of pi can be approximated by calculating the areas of inscribed and circumscribed polygons. This applet allows for the investigation and comparison of both methods.
3. Proportioner- This applet is useful in discovering ratios of various objects as well as comparing two objects, as well as finding perimeter and area of objects.
4. Trigonometry- This web site has definitions, applets, and much more to help students learn about trigonometry and other connected concepts.
5. The Math Page: Trigonometry- This resource has multiple concepts for geometry and trigonometry. The concepts are divided among chapters with links on common unknown concepts to help students understand the text. This resource also provides exercises that can be done by the students (answers are provided).
6. Web Math - Students could use this as a resource for review or to clarify topics discussed in class but not fully understood. The resource is easy to use and navigate to either specific concepts or broader topics. The site also offers specific sections on the conversion of units (applicable to the sciences).
7. Discovery Math: Exploring Geometry - This lesson plan includes a project that allows students to deepen their understanding of simialar and congruent figures while also learning about surface area and geometric transformations.
 Title Pythagorean Theorem URL http://mathematica.ludibunda.ch/pythagoras.html Materials needed Flash 5 or higher Learning Objectives Students will: . prove the Pythagorean Theorem Grade Levels Geometry CA 97 Standards Geometry: 14.0 Students prove the Pythagorean Theorem. Geometry: 15.0 Students use the Pythagorean Theorem to determine distance and find missing lengths of sides of right triangles CA Common Core State Standards Standards for Mathematical Practice: 5. Use appropriate tools strategically 6. Attend to precision 7. Look for and make use of structure 8. Look for and express regularity in repeated reasoning 8-Geometry: Understand and apply the Pythagorean Theorem. 8-Geometry-6:. Explain a proof of the Pythagorean Theorem and its converse. 8-Geometry-7: Apply the Pythagorean Theorem to determine unknown side lengths in right triangles in real-world and mathematical problems in two and three dimensions. 8-Geometry-8: Apply the Pythagorean Theorem to find the distance between two points in a coordinate system. Geometry-SRT 4. Prove theorems about triangles. Theorems include: a line parallel to one side of a triangle divides the other two proportionally, and conversely; the Pythagorean Theorem proved using triangle similarity. How could you use this resource? This site could be used either by a teacher in a whole-class demonstration, or by students in a lab setting to develop the meaning of the Pythagorean Theorem. Subsequent pages on the site could be used as a reference to a proof of the Pythagorean Theorem. EL and Special Needs This site could be used either by a teacher in a whole-class demonstration, or by students in a lab setting to develop the meaning of the Pythagorean Theorem. Subsequent pages on the site could be used as a reference to a proof of the Pythagorean Theorem. Lesson Plans Share your lesson plan on MERLOT! See other teachers' lesson plans on MERLOT. Teacher Comments Share your comments on MERLOT! See other teacher comments on MERLOT. Cost Free Copyright unknown