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TG Grade 3 Perimeters of Polygons
Page history
last edited
by Michelle Pettit 14 years ago
Submitted by:
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Michelle Pettit
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Date:
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3/30/10
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Edited by:
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Susan Montry
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Date:
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4/1/10
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Unit Name: Team Geometry
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Unit Length: 6 weeks
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Overview: Find the perimeter of a playing court using polygons, triangles and quadrilateral shapes.
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DESIRED RESULTS
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TEKS and SEs
TEKS 3.8Identify classify and describe two and three dimensional geometric figures by their attributes. Compare two dimensional figures or both by their attributes using formal geometry vocabulary.
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Critical Vocabulary
Polygon, side, vertex, triangle, quadrilateral, square, rectangle, parallelogram, perimeter, length, width
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Enduring Understandings (Big Ideas)
In this lesson, you will learn to recognize a polygon and describe it by its number of sides.
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Essential Questions
What is the same in all the polygons?
How can you sort the shapes?
Are all the sides equal length?
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Learning Goals and Objectives
Find the perimeter of polygon shapes.
Sort and classify polygons based on perimeter size and shape.
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Materials Needed
Area Perimeter black line master, scissors, sticky notes, ruler
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ASSESSMENT PLAN
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Performance Tasks
-Students measure each shape and add the sides together to get the perimeter of the whole court and half the court.
-Students measure and record the perimeter for all the shapes, then classify them as triangle or quadrilaterals from least to greatest.
-Students measure perimeter for polygon shapes with interactive website for direct feedback
http://www.ixl.com/math/practice/grade-3-perimeter
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Other Evidence
-Sts work together on the performance tasks
-Sts complete the perimeter classification independently.
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LEARNING PLAN
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Engage:
-Sts compare & contrast different sport playing courts by looking for shapes within a shape with a partner.
Explore:
-Sts find the perimeter of the large rectangle before cutting, and find the perimeter of half the court with a partner.
Explain:
-Write statements to describe what you discovered with a partner using different colored markers on paper.
Elaborate:
-Sts sort by shape of polygons; triangles- 3sides, quadrilaterals-4 sides
-Sts measure the sides each of each shape using centimeters and add the sides to get the perimeter of the shape with a partner.
Evaluate:
-Sts order pieces from least to greatest perimeter using centimeters, independently.
-Compare results as a class.
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Time
5min
5min
10min
20min
15min
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Extension:
All pieces on the sheet fit perfectly into a rectangle. Could all pieces be arranged into a triangle, square, or parallelogram?
Modifications:
Provide only half the sheet of shapes to the students, reduce the amount of pieces.
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TG Grade 3 Perimeters of Polygons
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