1. Geometry Using Paper Folding

2. Terms Right angle – measures 90  Perpendicular lines – intersects at 90  < Parallel lines – coplanar & never intersect Segment bisector – line that divides segment into two equal parts Perpendicular bisector - 90  and divides into two equal parts. Angle bisector –divides < into two = <

3. Assessing Prior Knowledge 1. Perpendicular line segments 2. A right angle 3. A 45  angle 4. A line that divides a right angle in half. Identify the following in the figure to the right: A B C D H G F E O

4. Origami The ancient Japanese art of paper folding, relies on properties of geometry to produce fascinating and often beautiful shapes.

5. Cultural Connection: Asia The Crane base is the starting point of the traditional origami figures, including the popular paper crane. The folds below are one way of beginning a crane base

6. Internet sites of interest http://www.origami.vancouver.bc.ca/ http://www.geocities.com/Athens/Academy/4800/ basics1.html http://members.aol.com/ukpetd/ http://chasm.merrimack.edu/~thull/OrigamiMath. html