If the figure is the front view and left view of a regular hexagonal prism, then a = () A. 23B. 3C. 2D. 1

From the front view and the left view of the regular hexagonal prism, we can get that the longest diagonal length of the regular hexagonal prism is 4, then the side length is 2, making ad ⊥ BC in D. in △ ABC, ab = AC = 2, ∠ BAC = 120 °, in right angle △ abd, ∠ abd = 30 °, ad = 1, ｜ BD = AB2 − & nbsp; ad2 = 22 − 12 = 3

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