Question

decide if this statement is valid or invalid. all squares are rectangles. abcd is a square, so abcd is a rectangle. invalid valid

Explanation:

Step1: Analyze the properties of a square and a rectangle

A square has four right angles and opposite sides equal, which are the properties of a rectangle.

Step2: Apply the general - specific logic

Since all squares have rectangle properties (general statement: all squares are rectangles), and ABCD is a square (specific case), by the rule of logical deduction (if all elements of a set \(S\) have property \(P\), and an element \(x\) belongs to \(S\), then \(x\) has property \(P\)), ABCD has the properties of a rectangle.

Answer:

Valid