PROPERTIES OF QUADRILATERALS
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Olson, Margaret A. Morgan Park High School
1. Students will discover the names and definitions of different kinds of
2. Students will discover the properties of quadrilaterals.
3. Students will learn to apply the correct property to each different kind of
EQUIPMENT AND MATERIALS NEEDED
Overhead Projector, transparencies, and projector pens; Rulers; Protractors; Colored
acetate plastic models of quadrilaterals for overhead; Colored plastic models of
quadrilaterals for placement on wall chart; Tape for hanging chart; Large wall or
blackboard chart with list of all properties of quadrilaterals; and Material to tack
models on wall chart.
Using the overhead projector, place quadrilaterals on the acetate until the
students have discovered the names of all the different kinds of quadrilaterals.
Do a review of vocabulary to be sure that all words in the properties are
understood, and at the same time develop the definitions of the quadrilaterals.
Develop a list of the facts that are true about some or all of the different
quadrilaterals. These facts or properties are displayed on a wall chart that is hung
on the blackboard.
Then the class is grouped into teams, and each team will be given a set of
plastic models of quadrilaterals. The teams are to discuss and measure until they
discover the properties that belong to their quadrilaterals. Students will be given a
printout with the list of all the properties. After a period of time, one member of
each team will go to the chart and place the models on a property that they possess.
NO MORE THAN ONE KIND OF QUADRILATERAL ON EACH PROPERTY!
When finished the team representative should report to the teacher. When all the
teams have completed the placement, an acetate with the answers will be placed on the
overhead screen, and the accuracy of answers will be checked. The team that completed
first and has the highest accuracy is the winner.
For homework, the students will have to complete a sheet listing all the
properties that belong to each different kind of quadrilateral.