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| ==Concept #3. Types of polygons== | | ==Concept #3. Types of polygons== |
| ===Learning objectives=== | | ===Learning objectives=== |
− | # There are several ways to classify polygons. One way to classify them is by considering their angle measures and side length measures. If a polygon's angles and sides are equal, then the polygon is called a regular polygon. If the measures of a polygon's angles or side lengths differ, then the polygon is called an irregular polygon. | + | # There are several polygons. |
| + | # Polygons are classified by considering their angle measures and side length measures. |
| + | # If a polygon's angles and sides are equal, then the polygon is called a regular polygon. |
| + | # If the measures of a polygon's angles or side lengths differ, then the polygon is called an irregular polygon. |
| + | # Primary shapes can be combined to form composite polygons. (This knowledge will help while deducing area formulae for complex figures which would be derived by splitting them into primary figures.) |
| ===Notes for teachers=== | | ===Notes for teachers=== |
| ===Activity No # Tangram=== | | ===Activity No # Tangram=== |
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| (f) a triangle with three pieces; | | (f) a triangle with three pieces; |
| (g) a rectangle with all seven pieces. | | (g) a rectangle with all seven pieces. |
| + | (h) a kite with two traingles. |
| # Finally, put the pieces back together to form the original square. | | # Finally, put the pieces back together to form the original square. |
| *Developmental Questions: | | *Developmental Questions: |
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| # Name the dimensions of each shape. | | # Name the dimensions of each shape. |
| *Evaluation: | | *Evaluation: |
− | # Analyse how much space each shape is occupying. | + | # Were the students able to identify the types of polygons based on the number of sides. |
− | # What can you refer to the space occupied by each shape. | + | # What type of two triangles would you need to form a square ? |
| *Question Corner: | | *Question Corner: |
| # What are the characteristic properties of each shape: square, rectangle, triangle, parallelogram and trapezium ? | | # What are the characteristic properties of each shape: square, rectangle, triangle, parallelogram and trapezium ? |
− | # What type of two triangles would you need to form a square ?
| |
| # What did you learn from this activity ? | | # What did you learn from this activity ? |
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