In the regular triangular prism abc-a1b1c1, if AB = 2 and a & nbsp; A1 = 1, then the distance from point a to plane a1bc is () A. 34B. 32C. 334D. 3

In the regular triangular prism abc-a1b1c1, if AB = 2 and a & nbsp; A1 = 1, then the distance from point a to plane a1bc is () A. 34B. 32C. 334D. 3

Let the distance from point a to plane a1bc be h, then the volume of the triangular pyramid va1 − ABC is va1 − ABC = VA − a1bc, that is, 13s △ ABC · Aa1 = 13s △ a1bc · h { 13 · 3 · 1 = 13 · 2 · h { H = 32