Subjects geometry

Circle Area E272Dc

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1. The problem is to find the area of a circle using a method suitable for primary six students. 2. The formula for the area of a circle is given by $$\text{Area} = \pi r^2$$ where $r$ is the radius of the circle. 3. Important rule: $\pi$ (pi) is approximately 3.14, and the radius is the distance from the center of the circle to any point on its edge. 4. To find the area, first measure the radius $r$. 5. Then square the radius: calculate $r^2 = r \times r$. 6. Multiply the squared radius by $\pi$: $$\text{Area} = 3.14 \times r^2$$. 7. For example, if the radius is 5 units, then: $$r^2 = 5 \times 5 = 25$$ $$\text{Area} = 3.14 \times 25 = 78.5$$ 8. So, the area of the circle is 78.5 square units. 9. This method helps primary six students understand the area of a circle by breaking it down into simple steps using multiplication and the constant $\pi$.