Naum gabo's constructed head no. 2 investigates the sense of and form implied by flat planes, in contrast to the solid mass of conventional sculpture.

The Constructed Head No. 2 is a painting that was done by Naum Gabo. And this painting investigates the sense of SPACE and form implied by flat planes instead of the traditional type of sculpture. The answer that best fits the blank is the term SPACE. Hope this helps.

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