SAT OG 第907页the figure above show part of a circle whose circumference is 45.the figure above show part of a circle whose circumference is 45.if arcs of lenght 2 and length b continue to alternate around the entire circel so that there are 18 arc
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SAT OG 第907页
the figure above show part of a circle whose circumference is 45.the figure above show part of a circle whose circumference is 45.if arcs of lenght 2 and length b continue to alternate around the entire circel so that there are 18 arcs of each lenght what is the degree measure of each of the arcs lf length b.
运算过程:
(2+b)* 18=45
b=0.5 算出弧长b是0.5.
0.5/45=x/360 (0.5对应x度,45对应360度,依此进行比率计算)
x=4 (得出结果为4度)
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