Answer:

C. Square

What is a regular quadrilateral called?

• Square (regular quadrilateral): all four sides are of equal length (equilateral), and all four angles are right angles.

Step-by-step explanation:

Answer!

C. Square

• Square is a quadrilateral with four equal sides and angles. It's also a regular quadrilateral as both its sides and angles are equal. Just like a rectangle, a square has four angles of 90° each. It can also be seen as a rectangle whose two adjacent sides are equal.

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