Question

what do all rectangles have in common? all sides the same length 4 acute angles no sides the same length 4 right angles

Explanation:

A rectangle is a quadrilateral. By definition, a rectangle has four right - angles (\(90^{\circ}\) angles).

• For the option “all sides the same length”: A square (a special type of rectangle) has all sides the same length, but a non - square rectangle has opposite sides equal, not all sides equal.
• For the option “4 acute angles”: Acute angles are less than \(90^{\circ}\). Since a rectangle has \(90^{\circ}\) angles, this option is incorrect.
• For the option “no sides the same length”: A rectangle has opposite sides equal, so this option is incorrect.

Answer:

4 right angles