0
Well...the fifth row is 1 5 10 10 5 1...but to possibley solve a problem you need a formula for example (x+y)^2
* * * * *
No, these are triangular numbers.
The formula for the nth term is t(n) = n(n+1)/2
They are called triangular numbers because if you make one mark on the first line, two marks on the second, three on the third, etc you will generate these numbers and with each line the marks form a triangular shape.
Add your answer:
Earn +20 pts
What two triangle numbers make 25?
t(4) = 10 t(5) = 15 10 + 15 = 25
Could the side lengths 9 15 and 10 represent a right triangle?
No. In order to be the sides of a right triangle, the square of one of the numbers must be the sum of the squares of the other two numbers. (the square of 9) + (the square of 10) = 181 but (the square of 15) = 225 .
What number is missing from the sequence 3 6 15 21?
The number 10 comes between 6 and 15. The numbers 3, 6, 10, 15, 21, and 28 are called TRIANGLE NUMBERS because they can be represented by lines of dots that form an equilateral triangle. They represent the additive sum 1+2+...+n which is equal to n (n+1)/2.
What is the triangle numbers between 50 and 70?
15
What is the nth term formula for the triangle numbers 1 3 6 10 15 21?
(n^2+n)/2
What two triangle numbers make 25?
t(4) = 10 t(5) = 15 10 + 15 = 25
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.
What arethe first 6 triangle numbers?
1, 3, 6, 10, 15, 21
Could the side lengths 9 15 and 10 represent a right triangle?
No. In order to be the sides of a right triangle, the square of one of the numbers must be the sum of the squares of the other two numbers. (the square of 9) + (the square of 10) = 181 but (the square of 15) = 225 .
What number is missing from the sequence 3 6 15 21?
The number 10 comes between 6 and 15. The numbers 3, 6, 10, 15, 21, and 28 are called TRIANGLE NUMBERS because they can be represented by lines of dots that form an equilateral triangle. They represent the additive sum 1+2+...+n which is equal to n (n+1)/2.
What is the triangle numbers between 50 and 70?
15
The sides of a triangle measure 10 11 and 15 what is the average lenght of the sides?
12. This is because you add the numbers and then divide by the amount of numbers to get an average. So here we add the numbers and divide the total by 3. 10+11+15 = 36. 36/3 = 12.
What is the nth term formula for the triangle numbers 1 3 6 10 15 21?
(n^2+n)/2
Is a 15 15 5 a right triangle?
No. There can be no isosceles right angled triangle with all three sides being rational numbers.
What is the first ten triangle numbers?
Depending upon the definition used, the first 10 natural numbers are either: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or (first appearing in the 19th century): 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
Is 12 a triangle number?
No but 10 and 15 are :D
What are triangular numbers used for?
Triangular numbers enumerate the items that can be arranged in a triangle. For example, ten blowling pins (10 is 4 triangled) and fifteen bowling pins (15 is 5 triangled). Applications might include counting band members in a triangle formation, or napkins in a triangle pattern at a wedding. - Bill
