Examples of using Triangular number in English and their translations into Serbian
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Colloquial
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Ecclesiastic
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Computer
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Cyrillic
All square triangular numbers are found from the recursion.
Every hexagonal number is also a triangular number.
Every other triangular number is a hexagonal number. .
Equivalently, if the positive triangular root n of x is an integer,then x is the nth triangular number.[11].
This triangular number we are studying right now Pythagoras discovered it.
The difference of two positive triangular numbers is a trapezoidal number. .
An n-th triangular number is equal to the sum of all numbers starting from 1 up to n.
For example, the digital root of 12, which is not a triangular number, is 3 and divisible by three.
Alternating triangular numbers(1, 6, 15, 28,…) are also hexagonalnumbers.
Some numbers, like 36, can be arranged both as a square andas a triangle(see square triangular number).
There are infinitely many triangular numbers that are also square numbers; e.g., 1, 36.
For example, the sixth heptagonalnumber(81) minus the sixth hexagonalnumber(66)equals the fifth triangular number, 15.
Like a triangular number, the digital root in base 10 of a hexagonal number can only be 1, 3, 6, or 9.
More generally, the difference between the nth m-gonal number and the nth(m+ 1)-gonal number is the(n- 1)th triangular number.
The sum of the all triangular numbers up to the nth triangular number is the nth tetrahedral number, .
In a tournament format that uses a round-robin groupstage,the number of matches that need to be played between n teams is equal to the triangular number Tn- 1.
If x is a triangular number, then ax+ b is also a triangular number, given a is an odd square and b= a- 1/8.
The number 9, on the other hand, can be(see square number): Some numbers, like 36, can be arranged both as a square andas a triangle(see square triangular number): By convention, 1 is the first polygonal number for any number of sides.
A square whose side length is a triangular number can be partitioned into squares and half-squares whose areas add to cubes.
A triangular number or triangle number counts objects arranged in an equilateral triangle, as in the diagram on the right.
It is also interesting that the square of a triangular number Tn is equal to the sum of the cubes of the natural numbers from 1 to n.
A triangular number or triangle number numbers the objects that can form an equilateral triangle, as in the diagram on the right.
Every hexagonal number is a triangular number, but only every other triangular number(the 1st, 3rd, 5th, 7th, etc.) is a hexagonal number. .
The triangular number Tn solves the"handshake problem" of counting the number of handshakes if each person in a room with n+ 1 people shakes hands once with each person.
The nth triangular number is the number of dots in the triangular arrangement with n dots on a side, and is equal to the sum of the n natural numbers from 1 to n.
Knowing the triangular numbers, one can reckon any centered polygonal number; the nth centered k-gonal number is obtained by the formula C k n= k T n- 1+ 1{\displaystyle Ck_{ n}= kT_{ n-1} +1}where T is a triangular number.
Note that b will always be a triangular number, because 8× Tn+ 1=(2n+ 1)2, which yields all the odd squares are revealed by multiplying a triangular number by 8 and adding 1, and the process for b given a is an odd square is the inverse of this operation.
If x is a triangular number, then ax+ b is also a triangular number, given a is an odd square and b= a- 1/8 b will always be a triangular number, because 8Tn+ 1=(2n+ 1)2, which yields all the odd squares are revealed by multiplying a triangular number by 8 and adding 1, and the process for b given a is an odd square is the inverse of this operation.