## Investigate the sum of the angles in a triangle and a quadrilateral using various methods. 0606.4.1

## Links verified on 7/14/2014

Quadrilaterals

- Construction of Bicentric Quadrilateral - a mathematical droodle
- Interactive Quadrilateral - drag the dots
or- Practice With Quadrilaterals - a twelve question quiz with drawings
- Quad Squad - a quick lesson on classifying and describing quadrilaterals
- Quadrilateral Family - from regents prep
- Quadrilateral Matching - concentration style quiz
- Quadrilateral Quest - interactive lesson, drag and drop activity
or- Quadrilateral Sorter - click on a shape to find out about it
- Quadrilaterals Explained - from Math is Fun
or- Quadrilaterals - explanation, examples and questions to answer
- Quadrilaterals - a wikipedia entry with a large number of drawings
- Shapes: Quadrilaterals - explanation and questions to show understanding
- What's My Quadrilateral - three different teaching ideas

Triangles

- Angle Classification: Acute, Right, Obtuse - explanation and questions to answer
- Angles - Students practice their knowledge of acute, obtuse and alternate angles.
- Angles - game to help recognize angles
or- Basic Geometric Figures - a TAKS worksheet to print and use in class [This expired link is available through the Wayback Machine Internet Archive. If the page doesn't load quickly click on Impatient? at the bottom right of the page.]
- Classifying Angles - multiple-choice quiz [5 questions]
- Equilateral, Isosceles, and Scalene Triangles - choose the most restrictive term
- Geometry Building Blocks: Classifying Angles - explanation and drawings
- How Do We Measure Angles? - six page worksheet to print and use in class
- Measuring Angles - use a virtual protractor
- Measuring Angles - Practice lining up and reading a protractor while you measure a set of angles in a fun learning activity
or- Names of Angles - definition and drawings of each type
or- Making Triangles - investigating the Concept of Triangle and the Properties of Polygons (from NCTM)
- Right, Acute, and Obtuse Angles - sort angles into appropriate containers
or- Right, Acute, and Obtuse Angles - figures are shown, decide which is the proper angle
- Squaring the Triangle - learn about how the Pythagorean Theorem works, through investigating the standard geometric proof. Parameters: Sizes of the legs of the triangle.
- 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.
- Triangle Explorer - Students learn about areas of triangles and about the Cartesian coordinate system through experimenting with triangles drawn on a grid.
- Triangle Identification - type of triangle, given its angles - instruction and review, practice, and a quiz
and- Triangle Identification - identify the triangle given its
angles- instruction and review, practice, and a quizand- Triangle Identification - identify the triangle given its
number of sides- instruction and review, practice, and a quizand- Triangles Side-By-Side - use geometric vocabulary to describe properties of triangles
- Types of Angles - definitions, and drawings of each type
- Virtual Protractor - ten online activities investigating angles
or

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