Name | Emphasis | Description | Problem addressed (see above) | Suggested duration (minutes) | Available for self - learning? |
---|---|---|---|---|---|
Circumference and Diameter | Recognize the relationship between circumferences and diameters | With the HTML5 dynamic figure and the worksheet, students measure the circumferences of circles of diameters 1 cm, 2 cm, 3 cm and other diameters. By calculating the value of π = circumference ÷ diameter, students recognize that the circumference is about 3.14 times the diameter and the formula for the circumference. | 25 | ||
Area of Circles | Explore the formula for the area of circles | With the HTML5 dynamic figure and the worksheet, students dissect a circle into sectors. By rearranging the sectors and increasing the number of sectors, students explore the formula for the area of the circle by observing the shape obtained when the number of sectors tends to infinity. | 25 |
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