choose simple shapes curves, triangles, trapezoids
how do you find the area of trapezoid?
why i hate the definition of trapezoids (again)
油管搜math antics所有视频都按照不同内容分了类既然要看电视,那不如
trapezoidbone6尺骨头headofulna7尺骨茎突styloidprocessofulna8月骨
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