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Any prime can be made into only one rectangle.

Any composite number can always be made into at least two different rectangles.

Q: What are some numbers that can be made into only one rectangle?

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If you cut a rectangle in half you wouldn't get a solid figure at all, since a rectangle is a plane figure. If you made a straight line cut you would get either a triangle or a quadrilateral of some variety depending on exactly how the cut was made.

Yes. A rectangle has 2 pairs of parallelogram and all of the angles are 90 degrees. If a rectangle ends up having 4 equal sides, then it is a square. Therefore, only some rectangles can be squares. (It is important to think of squares as a "special" type of rectangle!)

The answer will depend on what those numbers represent and their units. It is possible that the question gives 18 and 5 units as the length and width of a rectangle and requires you to find the area and perimeter. Or It is possible that the question has given 18 in some units and 5 in some other units and requires you to determine which one could be the area and which the perimeter.

That depends on whether the numbers represent, inches, feet, yards, centimeters, or some other thing.

Every square is a rectangle because a rectangle is a polygon with 4 sides (a quadrilateral) and 4 right angles. A square is a rectangle with 4 equal sides. So the thing that would makes some rectangles not like squares is they have only two sides of equal length and not four.

Related questions

1, 3, 5,9

Those would be the prime numbers: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47

Only some. Only some. Only some. Only some.

Some of them are, but not all of them. A parallelogramis a rectangle only if all of its angles are equal.

A square is a specialized type of a rectangle. All squares are also rectangles, but only some rectangles are squares.

If you cut a rectangle in half you wouldn't get a solid figure at all, since a rectangle is a plane figure. If you made a straight line cut you would get either a triangle or a quadrilateral of some variety depending on exactly how the cut was made.

They are numbers, only some of whose digits are known.

Yes. A rectangle has 2 pairs of parallelogram and all of the angles are 90 degrees. If a rectangle ends up having 4 equal sides, then it is a square. Therefore, only some rectangles can be squares. (It is important to think of squares as a "special" type of rectangle!)

Nobody made them. They are a property of some integers.

Prime numbers have only 2 factors while composite numbers have more than 2 factors

The answer will depend on what those numbers represent and their units. It is possible that the question gives 18 and 5 units as the length and width of a rectangle and requires you to find the area and perimeter. Or It is possible that the question has given 18 in some units and 5 in some other units and requires you to determine which one could be the area and which the perimeter.

That depends on whether the numbers represent, inches, feet, yards, centimeters, or some other thing.