Geometry Using Paper Folding

TermsRight angle – measures 90 Perpendicular lines – intersects at 90<Parallel lines – coplanar & never intersectSegment bisector – line that divides segment into two equal parts

Perpendicular bisector - 90and divides into two equal parts.Angle bisector –divides < into two = <

Assessing Prior Knowledge

1.Perpendicular line segments

2.A right angle3.A 45 angle4.A line that

divides a right angle in half.

Identify the following in the figure to the right:

A B C

DH

G F E

O

Origami

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

Cultural Connection: AsiaThe 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

Internet sites of interesthttp://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