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一、三棱锥的每个面都可作为棱锥的底面,每个顶点都可成为棱锥的顶点.在解题中,若能充分利用三棱锥的这一特点,往往可使问题简明易解.
First, each face of the triangular pyramid can be used as the bottom of the pyramid, and each vertex can become the vertex of the pyramid. In solving the problem, taking full advantage of this feature of the triangular pyramid can often make the problem simple and easy to solve.