Shmoop University
Shmoop: Basic Geometry: Triangles
The geometry resource explores triangles. Descriptions, examples, and practice exercises are included.
Shmoop University
Shmoop: Basic Geometry: Pythagorean Theorem
Students learn about the Pythagorean Theorem. Notes, practice problems, and examples are included in the geometry resource.
National Council of Teachers of Mathematics
The Math Forum: Problems Library Geometry Triangles
This site contains a wealth of problems that deal with the basic definitions of medians, altitudes, angle bisectors, and perpendicular bisectors or the defining characteristics of the different types of triangles. There are also...
Math Is Fun
Math Is Fun: Pythagorean Triples
Students investigate the sets of whole numbers that are Pythagorean triples. A definition and examples are included.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Types of Triangles
Find a quick, concise explanation of the different types of triangles. Examples are given and clearly explained.
National Council of Teachers of Mathematics
Nctm: Figure This: Nctm Math Challenge Three Squares (Pdf)
If you think you can handle the Pythagorean Theorem, then this is a math challenge you should try. Explore geometric relationships and measurement in this one page activity from the NCTM Math Challenges for Families series.
McGraw Hill
Glencoe: Self Check Quizzes 2: The Pythagorean Theorem
Test your knowledge of the Pythagorean Theorem with these practice problems. Each question has a "Hint" link to help. At the bottom of the page click the "Check It" button and the correct answer for each problem appears beside it. Also,...
Walter Fendt
Walter Fendt: Pythagorean Theorem (2)
A short interactive activity to visualize the Pythagorean Theorem.
Ducksters
Ducksters: Kids Math: Triangles
Learn about equilateral, right angle, and isosceles triangles on this site. Learn how they work, terms, tricks and examples. .
Mocomi & Anibrain Digital Technologies
Mocomi: What Is the Pythagorean Theorem?
Explains the Pythagorean Theorem formula, the Pythagorean Triples, and why the theorem is important.
Science and Mathematics Initiative for Learning Enhancement (SMILE)
Smile: Geometry Distance of Triangles Using a Protractor
Basic exercises are presented to help students understand the concept of the area of triangles and the angles of a triangle.