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The nth triangular number is n*(n+1)/2 for n = 1, 2, 3, ...
In order to figure out if a given number, K, is triangular or not, you need to be able to solve the quadratic
n2 + n - 2k = 0
If the solution is a positive integer then the number is a triangular number.
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What is this triangle 78 42?
78 42 are, as far as I can make out, two numbers. They do not make a triangle.78 42 are, as far as I can make out, two numbers. They do not make a triangle.78 42 are, as far as I can make out, two numbers. They do not make a triangle.78 42 are, as far as I can make out, two numbers. They do not make a triangle.
Are triangle numbers the same as cube numbers?
No
What are face numbers on a triangle?
A triangle has only 1 face.
Who invented triangle numbers?
By Pascal
How do you get triangular numbers?
By making a triangle
How are the odd numbers arranged in Pascal's Triangle?
how are the odd numbers arranged Pascal's Triangle?
What is this triangle 78 42?
78 42 are, as far as I can make out, two numbers. They do not make a triangle.78 42 are, as far as I can make out, two numbers. They do not make a triangle.78 42 are, as far as I can make out, two numbers. They do not make a triangle.78 42 are, as far as I can make out, two numbers. They do not make a triangle.
Are triangle numbers the same as cube numbers?
No
Can 100 be a triangle number?
No. Triangle numbers are a fixed set of numbers that can't be altered to make one certain number turn into a triangle number.
What are face numbers on a triangle?
A triangle has only 1 face.
How do you calculate numbers of edges on triangle?
There are always 3 edges on a triangle, otherwise it would not be a triangle.
What are the first 5 triangular numbers?
Triangle numbers or triangular numbers are those numbers that can form an equilateral triangle when counting the objects. The first five triangular numbers are: 1, 3, 6, 10, 15.
Who invented triangle numbers?
By Pascal
How do you get triangular numbers?
By making a triangle
Is 145 a triangle number?
No. The closest triangle numbers to 145 are 136 and 153.
Add two triangle numbers to make 38?
10 + 28 are two triangle numbers that, added together total 38.
How you find the area of a triangle?
To find the area of a triangle, you have to multiply the base of the triangle and the height of the triangle, then divide the product of those numbers by two.
