Question

decide if this statement is valid or invalid
all rectangles are quadrilaterals. abcd is a rectangle. therefore, abcd is a quadrilateral

Explanation:

Step1: Analyze the definition of rectangle and quadrilateral

A rectangle is a four - sided polygon. A quadrilateral is also a four - sided polygon.

Step2: Check the logical relationship

Since all rectangles (including \(ABCD\)) have four sides (the property of a quadrilateral), if \(ABCD\) is a rectangle (a type of four - sided figure), then \(ABCD\) must be a quadrilateral.

Answer:

Valid