true or false: every rectangle is a parallelogram
False
False. Every rectangle is indeed a parallelogram, but not every parallelogram is a rectangle.
A rectangle is a special type of parallelogram where all angles are right angles (90 degrees). It has two pairs of opposite sides that are equal in length and parallel to each other. So, while a rectangle meets the criteria to be a parallelogram, not all parallelograms have right angles.
In summary, all rectangles can be classified as parallelograms, but not all parallelograms can be classified as rectangles.
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