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Geometric Constructions

Geometric Constructions. During this lesson, you will duplicate segments and angles using your straightedge & compass. INTRODUCTION.

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Geometric Constructions

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  1. Geometric Constructions During this lesson, you will duplicate segments and angles using your straightedge & compass.

  2. INTRODUCTION During this week, you will learn how to perform basic geometric constructions, using your straightedge and compass. As you work with your team members, remember to share the tasks and compare results. You should keep a record of your investigations and a separate list of your conjectures in your notebook.

  3. A Few Words on Geometric Constructions… “Geometric figures created with a compass and straightedge only are called ____________________. Since the Golden Age of Greece, people have made a game of geometric constructions. Over the centuries, people have enjoyed using their construction tools to discover geometry.” geometric constructions Discovering Geometry, KEY CURRICULUM PRESS, Serra, 1993

  4. Construction Tips • Read the “Construction Tips” provided to you in your notes packet. • Create a “brainstorming” list of key ideas.

  5. Comparison: Sketching, Drawing, and Constructing

  6. ABSENT from class? Need EXTRAHELP? Check out these self-help links NOW! Construction: Duplicating a Line Segment Construction: Sum of Two Segments Construction: Difference of Two Segments Construction: Equilateral Triangle Construction: Regular Quadrilateral Construction:Duplicating an Angle Construction: Sum of Two Angles

  7. Final Check for Understanding _______________ __________ ___ A B C D E F • Duplicate, by construction, the line segments above. • Use your copies of the segments above to construct the following: • AB + EF • 2AB - CD

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