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圆的面积和周长 (含小数的挑战)
π 取 3.14。答案保留两位小数（面积单位：平方厘米，长度单位：厘米）。
- 13–18 岁
- 数学
- 学习单
课程标准关联
- Common Core 7.G.B.4: Know and use the formulas for the area and circumference of a circle.
- England NC Y6.MA.GP.4: Name the parts of a circle (radius, diameter, circumference) and know the diameter is twice the radius.
- England NC KS3.MA.GEO.2: Calculate perimeters of 2-D shapes (including circles) and areas of circles and composite shapes.
- BNCC EF07MA33: Establish π as the ratio of a circle's circumference to its diameter and use it to solve problems.
- BNCC EF08MA19: Solve area problems for quadrilaterals, triangles and circles using area formulas.
- Programmes FR C3.MA.GM.1: Calculate the perimeter of polygons and the length of a circle.
- Programmes FR C4.MA.GM.1: Calculate perimeters and areas of usual shapes, including the disc.
许可协议：Crayonbird original
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