作业帮一道SAT数学题,求解..The figure above is made up of two identical 270-degree arcs.接上面.Each arc is part of a circle of radius 8. What is the area of the figure?图就是两个圆重叠了一部分.翻译我明白,给个答题过程就行..
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一道SAT数学题,求解..The figure above is made up of two identical 270-degree arcs.接上面.Each arc is part of a circle of radius 8. What is the area of the figure?图就是两个圆重叠了一部分.翻译我明白,给个答题过程就行..
一道SAT数学题,求解..The figure above is made up of two identical 270-degree arcs.
接上面.Each arc is part of a circle of radius 8. What is the area of the figure?
图就是两个圆重叠了一部分.翻译我明白,给个答题过程就行..答案是96π+64但是我怎么这么质疑它呢
一道SAT数学题,求解..The figure above is made up of two identical 270-degree arcs.接上面.Each arc is part of a circle of radius 8. What is the area of the figure?图就是两个圆重叠了一部分.翻译我明白,给个答题过程就行..
图形由两块相同的扇形两个相同的三角形组成.
麻烦给个图啊？本题没有图吗？
题目的意思是求出整个图形的面积；
就是把两圆的面积相加再减去重叠的那部分。
Π8²+∏8²=128∏，
重叠部分：¼（Π8²）+¼（∏8²）-8²=32∏-64.
再用上式减下式就得到答案。
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不管怎么样，两个圆重叠式可以分成N个扇形的。你把它分成N个扇形，然后用已知的半径，再用图求出扇形圆心角，就OK了