Illustrative Mathematics
Illustrative Mathematics: G Co, G Srt Congruence of Parallelograms
In this task, a student has learned the SSS and SAS congruence tests for triangles and wonders if these tests might work for parallelograms. Aligns with G-CO.C.11 and G-SRT.B.5
Khan Academy
Khan Academy: Determine Congruent Triangles
Use the triangle congruence criteria SSS, SAS, ASA, and AAS to determine that two triangles are congruent.
Other
Nearpod: Congruent Triangles & Similarity
In this lesson on congruent triangles, students explore how to use postulates to identify if triangles are congruent by SSS, SAS, ASA, and AAS.
Math Is Fun
Math Is Fun: Solving Triangles
Find guidelines to help you "solve" triangles, which means finding the value of missing sides and angles. Provided are examples of six scenarios in which you can solve a triangle's missing measurements, as well as relevant equations,...
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Determining Triangle Similarity
Dr. Math responds to a question about how to determine if two triangles are similar. The Dr. goes into detail about the process and gives several examples that are worked out for you.
Mathigon
Mathigon: Geometry: Triangles and Trigonometry: Triangles Congruence
This lesson focuses on triangle congruence; it shows the ways to prove that triangles are congruent.
CK-12 Foundation
Ck 12: Geometry: Triangle Congruence Study Guide
[Free Registration/Login may be required to access all resource tools.] Provides an overview of triangle congruence, including key terms, properties of congruent triangles, triangle postulates and theorems, and special triangles.
CK-12 Foundation
Ck 12: Geometry: Polygon Similarity Study Guide
[Free Registration/Login may be required to access all resource tools.] This study guide looks at similar polygons, scale factor (ratio), and triangle similarity.
CK-12 Foundation
Ck 12: Geometry: Comparing Angles and Sides in Triangles
[Free Registration/Login may be required to access all resource tools.] In this lesson students compare sides and angles in triangles. Students examine guided notes, review guided practice, watch instructional videos and attempt practice...
Jim Loy
Jim Loy's Mathematics Page: Congruence of Triangles
Find explanations of the ways to prove triangles are congruent. There is a link for Congruence Of Triangles, Part II to find the proofs of some ways to prove congruence of triangles from other postulates (i.e. Assume SAS prove ASA).
ClassFlow
Class Flow: Congruence in Triangles
[Free Registration/Login Required] This lesson helps teach congrence in triangles. Includes practice with postulates, theorems, and logical reasoning.
University of Pennsylvania
History and Sociology of Science: America's Golden Age of Medicine?
Examine the history of the Golden Age of Medicine in America from the 1930s through the 1960s. Use photographs, primary sources, essays, and the suggested questions to trace the advances made in drugs, technology, and the delivery of...
University of Pennsylvania
University of Pennsylvania Library: Synecdoche
Extended definition of synechdoche with origin of the word and timeline of its use in literature.
University of Pennsylvania
Univ. Of Pennsylvania: Agrarian History of South Asia
The University of Pennsylvania provides extensive discussions of the Gupta Empire's approach to imperialism through agrarian measures and built political alliances and the downfall of the Gupta's imperialism.
University of Pennsylvania
Corinth Computer Project: Roman Colony of Corinth
An absolutely great site to include in your study of the Roman occupation of Greece. Lots of information on the current Corinth Excavations being done. Be sure to access the Quick Time movie of the forum in Corinth as it is today.
Other
Aerobic Respiration (Glycolysis)
A very technical explanation of aerobic respiration. The process is explained and supplemented with a number of chemical formulas. Geared to the advanced student.
University of Pennsylvania
The University of Pennsylvania: Martyrdom in Fourth Maccabees
A doctoral article which discusses martyrdom in 4 Maccabees. Includes several quotes, textual analysis, and a bibliography.
CK-12 Foundation
Ck 12: Trigonometry: Sides of an Oblique Triangle
[Free Registration/Login may be required to access all resource tools.] This lesson covers using the Law of Cosines to find the third side of a triangle.
University of Pennsylvania
University of Pennsylvania: An Agrarian History of South Asia
A lengthy essay that fully describes agrarian history in South Asia, along with political connections.
Other
A Model of Mitosis
Make a model of mitosis as a first step to understanding the process. A vocabulary list with clear definitions is included in this site.
University of Pennsylvania
War & Peace in Classical Antiquity
Several book titles useful for studying Classical Antiquity.
University of Pennsylvania
Mandala: Buddhist Tantric Diagrams
Mandalas are used in the rituals of tantric initiation in Tibetan Buddhism and they influence the design and decoration of Tibetan monasteries.
Other
California Polytechnic State U.: Lecture Notetaking
A one-page handout, this site includes information about how lectures are typically structured, as well as advice about how to make the best use of the notes you take. Includes a bibliography.
Other
California Polytechnic State University: Listening Skill
This site from the California Polytechnic State University provides a concise and well done guide to listening that coveys what the instructor has to say, as well as the tasks of the listener. Good advice, easy to download as a one page...
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