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 arc

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
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.

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
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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