1. Measure the diameter of the cylindrical bucket and write the measurement method. 2. Draw a circle with a diameter of 10 meter and write the drawing method.

1. You can pour a certain height of water, measure the weight of water, divide it by the density of water to get the volume of water, and then divide it by the height of poured water to get the cross-sectional area of the bucket. You can calculate the diameter.

Use a 5-meter-long rope, one end is fixed, and you can turn it by pulling the other end.