A parallelogram with four right angles is called what?

• A. circumference
• B. width
• C. inflection point
• D. rectangle

Answer: (D)

A parallelogram with four right angles is a rectangle. The key idea is that a rectangle is a parallelogram where every interior angle measures 90 degrees, so the sides meet perpendicularly. This makes it the standard shape that combines the properties of a parallelogram (opposite sides parallel and equal) with right-angle corners. The other terms don’t describe a four-corner figure: circumference relates to circles, width is a general distance measure, and an inflection point is a concept on curves, not a four-angled shape.