"a polygon is a pentagon if and only if it has five sides."if this statement is true, then which of the following statements must also be true? a. a polygon is not a pentagon if and only if it does not have five sides. b. a polygon is not a pentagon if and only if it has five sides. c. a polygon is a pentagon if and only if it does not have five sides. d. a polygon does not have five sides if and only if it is a pentagon.

A.A polygon is not a pentagon if and only if it does not have five sides.

Explanation:

This can be confusing, but a pentagon is a five-sided polygon, so all polygons with 5 sides are pentagons, from the name penta-five is indicated, so any polygon which has any number different of sides to five is not a polygon, that´s why the correct option is A.A polygon is not a pentagon if and only if it does not have five sides., since its a double negation its confusing, but remember this, double negative is a positive, so A polygon is a pentagon if it has five sides.

the two answers are

get thee back into the tempest and the night's plutonian shore

on the pallid bust of pallas just above my chamber door

the author is showing that it is the insatisfaction of basic needs that brings about the protests such as the strikes.if workers do not earn enough to buy food and feed their families and themselves in order to continue working, what is the use of working? besides, another message from the author is that of the owners of factories should be worried about ensuring their furure by having a second and third generation of workers in their industries.if they do not hear the workers demands, they will not have any more workers to make their pockets full.