Lesson 3: COmparing POLYGONS
(Approximate Length: 1- 60 Minute Lessons)
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Content
Content
Expectations:
Expectations:
Algebra
E 1.2 identify and construct congruent triangles, rectangles, and parallelograms
Learning Goals
Learning Goals
We want students to understand...
We want students to understand...
How to measure and construct angles up to 180 degrees
How to identify and construct congruent triangles, rectangles and parallelograms
Success Criteria
Success Criteria
I know how to measure and construct angles up to 180 degrees.
I know how to identify and construct congruent triangles, rectangles and parallelograms
Pedagogy
Pedagogy
Minds On
Minds On
Source: Small, M. (2016) Open Questions: For the Three-Part Lesson Grades 4-8 Geometry and Spatial Sense, Data Management and Probability. Pg.44
Use geostrips, toothpicks or something similar to make three or four different polygons. The angles within each polygon should be equal.
Sample Responses:
Action!
Action!
Teacher Directed: Select students whose angles are correct and have them demonstrate how they constructed their angles. If more instruction is needed, you would do direct instruction and cover angles up to 180 degrees.
Now draw three different obtuse angles using a protractor. Then, using a protractor and a different angle from the ones before, draw three obtuse angles that are the same size but that look a lot different from one another.
Download transparent protractor image from Google and Use in Explain Everything
Use Geogebra: How to create regular polygons.
Consolidation Of Learning
Consolidation Of Learning
Source: Small, M. (2016) Open Questions: For the Three-Part Lesson Grades 4-8 Geometry and Spatial Sense, Data Management and Probability. Pg.46
Review the meaning of congruent.
Look at polygons made in the action portion of the lesson. Discuss the properties of the triangles, parallelograms and rectangles (including squares.)
Distance Learning: Make congruent shapes together including triangles (isosceles, right-angle, equilateral), parallelograms and rectangles, using the digital tools
Face to face: use protractors, grid paper, isometric dot paper, pencils.
Independent Task / Assessment Opportunities
Independent Task / Assessment Opportunities
Independent Practice:
Comparing Polygons and Quadrilaterals
Assessment: Have students make congruent rectangles, triangles and parallelograms (measure the angles) two if each shape.
Technology
Technology
Geogebra
Geogebra
Explain Everything
Explain Everything
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