Triangles

Links verified on 8/5/09

1. Angle Classification: Acute, Right, Obtuse - After the explanation there are questions to answer.
2. Angles - Practice your knowledge of acute, obtuse and alternate angles.
3. Angles - Play this game to help you recognize angles.
4. Classifying Angles - Take a multiple-choice quiz. [5 questions]
5. Geometry Building Blocks: Classifying Angles - There are eight questions for you to answer.
6. Measuring Angles - Practice using a virtual protractor.
7. Making Triangles - Investigate the Concept of Triangle and the Properties of Polygons. (from NCTM)
8. Triangle Identification - Identify the type of triangle, given its angles.
9. Protractor - Learn how to position and read a protractor in order to measure an angle, and how to use either scale on the protractor.
10. Pythagorean Explorer - Find the length of a side of a right triangle by using the Pythagorean Theorem, and then check your answers.
11. The Pythagorean Theorem - Take an online quiz.
12. Spy Guys Interactive - Working with Angles - watch the video and respond at various places Lesson 16
13. Squaring the Triangle - Learn about how the Pythagorean Theorem works, through investigating the standard geometric proof.
14. Triangle Calculator - Enter values for 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.
15. Triangle Explorer - Students learn about areas of triangles and about the Cartesian coordinate system through experimenting with triangles drawn on a grid.
16. Triangle Identification - Identify the triangle given its angles.
17. Triangle Identification - Identify the triangle given its number of sides.
18. Triangles Side-By-Side - Use geometric vocabulary to describe properties of triangles.