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题目1一个半圆半径是3厘米,这个半圆的周长是多少?一般算法:根据圆的半径,先求出圆周长的一半,再加上直径即为半圆的周长。列算式为:
Topic 1 A radius of semicircle is 3 cm, what is the circumference of the semicircle? General Algorithm: According to the radius of the circle, first find the half of the circumference, plus the diameter is the circumference of the semicircle. Column formula is: