## Triangles - CCSS 6.G.A.1, 6.G.A.4, Mathematical Practices

## Links verified on 02/24/2020

1. Angle Classification: Acute, Right, Obtuse.

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Lesson with examples and practice problems. SEE MORE

2. Angles.

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Practice your knowledge of acute, obtuse and alternate angles. (Additional related resources available under the learner tab.) SEE MORE

3. Geometry Building Blocks: Classifying Angles.

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Estimate the angle measures using the given figures. Match the descriptions to an angle in the provided list. There are eight "workout" questions. Lesson and examples are also available. SEE MORE

4. Making Triangles.

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Investigate the Concept of Triangle and the Properties of Polygons. (from NCTM) SEE MORE

5. Pythagorean Explorer.

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Find the length of a side of a right triangle by using the Pythagorean Theorem, and then check your answers. SEE MORE

6. Spy Guys Interactive - Working with Angles.

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Watch the video and respond at various places Lesson 16. This video includes sections which ask students to input responses. SEE MORE

7. Squaring the Triangle.

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Learn about how the Pythagorean Theorem works, the standard geometric proof and explore the angle of measurements. (Additional related resources located under the learner tab.) SEE MORE

8. Triangle Calculator.

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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. SEE MORE

9. Triangle Explorer.

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Students learn about areas of triangles and about the Cartesian coordinate system through experimenting with triangles drawn on a grid. (Additional related resources available under the learner tab.) SEE MORE

10. Triangle Identification (Sides).

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Identify the type of triangle by its number of sides. SEE MORE

11. Triangle Identification.

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Identify the type of triangle and angles given. SEE MORE

12. Triangle Identification.

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Identify the type of triangle given its angles. SEE MORE

13. Triangles Side-By-Side.

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Use geometric vocabulary to describe properties of triangles. SEE MORE

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