20 16 Qingdao Yimo mathematics

Solution: According to the three views, the geometric shape is a quadrangular cone, as shown in the figure, the side PD⊥ the bottom ABCD, PD=2, the bottom ABCD is a right trapezoid, ab∨DC,

AD⊥DC,AB= 1,AD=DC=2.

∴ The volume of the pyramid V =13× (1+2 )× 22× 2 = 2.

So the answer is 2.

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