2. Sort out the knowledge points: the definition of circle, and introduce the definition of circle, including the concepts of center and radius. Area formula of a circle: This paper mainly introduces the area formula of a circle, that is, S=πr2 (where S is the area and R is the radius).
3. Show the steps to solve the problem: Take a specific problem as an example to show the steps to solve the area of a circle, such as: Question: Find the area of a circle with a radius of 5 cm. Step 1: According to the topic, determine the radius of the circle R = 5cm. Step 2: Substitute the radius into the area formula S=πr2. Step 3: Calculate the area of the circle.
4. Exercise design: In order to help students consolidate their knowledge, some related exercises can be designed, such as finding the area of a circle with a radius of 4 cm. The area of a circle is 25π square centimeters. Find its radius.
5. Aesthetic enhancement: In order to make the handwritten newspaper more beautiful, it can be decorated with elements such as colors, graphics and borders. For example, you can circle with colored strokes, decorate topics and knowledge points with borders, and so on.
6. Summary and reflection