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Q: Is there a number wich is a square number a rectangular number and also a triangular number?

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36 is a triangular number, Square number and also a Consecutive number.

1, the first triangular number, is also a square.

If you define a rectangular number as a number which is the product of two consecutive integers, it cannot be square.

There are an many triangular numbers that are also square numbers. Simply put, the sum of two consecutive triangular number equals a square number. Examples include 1 and 36.

36 is the only square number that is also a triangular number between 20 and 40.

Yes. 36 is a triangular number, because it is 1+2+3+4+5+6+7+8, and it is also a square number, because 36=6x6. 1 is another square number that is traditionally considered to be triangular.

One, though it's technically a square - hence why it is called a square pyramid. By definition, a square pyramid has one square face. It also has four triangular faces which meet at the apex (the tip) of the pyramid.

A square or rectangular based pyramid is a 3D shape with 5 corners or points. It also has 4 triangular flat flaces, one square/retangular face and 8 straight edges.

If it also has two triangular faces, then a triangular prism. If it has only three rectangualr faces, there is no such shape.

A rectangular prism does not need to have any square faces. All its faces may be rectangular in shape. However, it may also have two or four square faces, yet still be a rectangular prism.

Here are some, with number of triangular faces in brackets:tetrahedron (4)triangular bipyramid (6)octahedron (8)pentagonal bipyramid (10)snub disphenoid (12)triaugmented triangular prism (14)gyroelongated square bipyramid (16).There is also a 24 faced stellation for an octahedron.Here are some, with number of triangular faces in brackets:tetrahedron (4)triangular bipyramid (6)octahedron (8)pentagonal bipyramid (10)snub disphenoid (12)triaugmented triangular prism (14)gyroelongated square bipyramid (16).There is also a 24 faced stellation for an octahedron.Here are some, with number of triangular faces in brackets:tetrahedron (4)triangular bipyramid (6)octahedron (8)pentagonal bipyramid (10)snub disphenoid (12)triaugmented triangular prism (14)gyroelongated square bipyramid (16).There is also a 24 faced stellation for an octahedron.Here are some, with number of triangular faces in brackets:tetrahedron (4)triangular bipyramid (6)octahedron (8)pentagonal bipyramid (10)snub disphenoid (12)triaugmented triangular prism (14)gyroelongated square bipyramid (16).There is also a 24 faced stellation for an octahedron.

A rectangular prism, or, since any rectangle is also a square, a cube.

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