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Part A: Measuring Area
Part B: Exploring Area With a Geoboard
Part C: Scaling the Area
Homework
Area is a measure of how much surface is covered by a particular object or figure. Units of measure for area involve shapes that cover the plane, such as rectangles or squares. Common units in the U.S. customary system are square inches, square feet, square yards, and square miles; the standard unit in the metric system is the square meter.
For information on required and/or optional materials for this session, see Note 1.
In this session, you will do the following:
Previously Introduced
Scale Factor: A scale factor is a constant used to enlarge or reduce a figure. For example, if the sides of a triangle are enlarged to twice the length of the original triangle, we say the scale factor is 2.
New in This Session
Area: Area is a measure of how much surface is covered by a figure.
Midline: A midline is a segment connecting two midpoints of a triangle.
Similar Figures: Similar figures are figures that have the same shape but may be of different sizes. In similar figures, corresponding angles are congruent and corresponding segments are in proportion.
Note 1
Materials Needed:
Geoboards and Power Polygons can be purchased from:
ETA/Cuisenaire
500 Greenview Court
Vernon Hills, IL 60061
Phone: 800-445-5985/800-816-5050 (Customer service)
Fax: 800-875-9643/847-816-5066
http://www.etacuisenaire.com