سوال ۲۴ کنکور ارشد علوم کامپیوتر ۱۳۹۷

Read the relevant excerpt from PASSAGE 2 and answer the question.

PASSAGE 2 (first paragraph): “In three-dimensional computer graphics, fractal techniques have been used to generate terrain models and the easiest techniques involve subdividing the facets of the objects that consist of triangles or quadrilaterals. A recursive subdivision procedure is applied to each facet, to a required depth or level of detail, and a convincing terrain model results.”

24- Choose the description that best fits the underlined word “quadrilaterals” in the first paragraph.