如图,将一副三角板叠放在一起,则图中∠α的度数是
度.
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有一个几何体,它的三视图都是正方形,则这个几何体的形状是
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如图,在△ABC中,BC=4,以点A为圆心,2为半径的⊙A与BC相切于点D,交AB于E,交AC于F,点P是⊙A上一点,且∠EPF=40°,则图中阴影部分的面积是( )
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