Question #6434358Single Choice

Geometry

Question

Which of the following syllogisms is invalid?

All rhombuses are parallelograms. All parallelograms have opposite sides equal. Therefore, all rhombuses have opposite sides equal.

All squares are rectangles. All rectangles have four right angles. Therefore, all squares have four right angles.

All circles are round. All round shapes are polygons. Therefore, all circles are polygons.

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