@internet4classr I4C

# CCSS.Math.Content.7.G.B.5 - Use facts about supplementary, complementary, vertical, and adjacent angles in a multi-step problem to write and solve simple equations for an unknown angle in a figure.

Authors: National Governors Association Center for Best Practices, Council of Chief State School Officers

Title: CCSS.Math.Content.7.G.B.5 Use Facts About Supplementary, Complementary, Vertical,... Geometry - 7th Grade Mathematics Common Core State Standards

Publisher: National Governors Association Center for Best Practices, Council of Chief State School Officers, Washington D.C.

(Page last edited 10/08/2017)

1. A Mathematical Droodle - Two Triples of Similar Triangles
2. Connecting Geometry: Similar Triangles - Similar triangles can be very useful for measuring inaccessible objects. One method of doing this is called "shadow reckoning," which this page describes
3. Examples of SSS, SAS, and AA - From Yahoo Answers
4. GeoWeb - Proving Triangles Similar and Congruent
5. Indirect Measurement with Similar Triangles - This five page lesson plan describes how to use a mirror in making indirect measurements.
6. Math Open Reference: Similar Triangles - Interactive triangle lesson
7. Measuring Angles - Use a virtual protractor
8. Proof Using Similar Triangles - Four examples to print and use in your classroom (text document)
9. Proportionality in Similar Triangles: A Cross-Cultural Comparison - A lesson plan from Convergence: a magazine of the Mathematical Association of America
10. Similar Triangles - Explanation of the concept
11. Similar Triangles - Includes the AA rule and the RAR rule plus two videos
12. Similar Triangles - A 23 slide PowerPoint show which includes scaling factors
13. Similar Triangles and Indirect Measurement - This worksheet gives a short review, an example and five practice problems
14. Similar Triangles and the Pythagorean theorem - From Dave's Short Trig Course
15. Similar Triangles II - A 14 slide PowerPoint show
16. Similar Triangles: SAS, AA, SSS - Theorems that prove triangles are similar
17. Strategies for Dealing with Similar Triangles - From Oswego City School District Regents Exam Prep Center [from the Internet archive, called the Wayback Machine.]
18. Sum of Angles in a Triangle - Students can explore this concept by moving the vertices of the triangle with pressed mouse button
19. Three Similar Triangles - A math droodle
20. Triangle Calculator - Enter values three of the six sides and angles of the triangle and the other three values will be computed. The number of significant values entered will determine the number of significant figures in the results.
21. Understanding Scale Factors - Similar Triangles: Perimeters and Areas - When two triangles are similar, the reduced ratio of any two corresponding sides is called the scale factor of the similar triangles

Internet4classrooms is a collaborative effort by Susan Brooks and Bill Byles.