Question

complete the pattern.
circle : circular
rectangle :

Explanation:

The pattern here is that the first word is a geometric shape, and the second word is the adjective form describing that shape. For "circle", the adjective is "circular". For "rectangle", the corresponding adjective is "rectangular" as it follows the pattern of forming an adjective from the noun (shape) by adding the appropriate suffix to describe the shape's nature.

Answer:

rectangular