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The nth triangulat number is n*(n+1)/2. So, the 61st is 61*62/2 = 1891
Wiki User
∙ 11y ago
Wiki User
∙ 8y agoThe nth triangular number is n(n+1)/2
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What is the ordinal number and word for 61?
61st or sixty-first.
How do you find the area of a triangle on a coordinate plane?
you count the number of boxes IN the shape.
How do you find an area for a triangle?
Lenght X Width, then you divide the number by 2.
How do you find the area and perimiter of a triangle?
To find the area of a triangle find the base and the height of the triangle. Then multiply the base by the height, then divide by 2. To find the perimiter of a triangle add together the outside edge of the triangle. To find the area of a triangle find the base and the height of the triangle. Then multiply the base by the height, then divide by 2. To find the perimiter of a triangle add together the outside edge of the triangle.
If two angles of a triangle are complementary find the number of degrees in the third angle?
90
What is the ordinal number and word for 61?
61st or sixty-first.
How do you find the no of triangle in a figure?
It is: number of sides -2 = number of triangles
What is the 61st odd number?
(61 x 2) - 1 = 121
How do you find out if a number is a triangle number without drawing dots?
two 7
How do you find the area of a triangle with the answer of 36?
first you would find the base (the bottom of the triangle ). Then you would need to find the length of the triangle (measure the top of the triangle all the way to the top point to the bottom of the triangle) then times the two number than divide the answer times 2 and you should get your answer
What date is exactly one- sixth of the way through a leap year?
Midnight on the 1st of March, which is the 61st day of the year.Midnight on the 1st of March, which is the 61st day of the year.Midnight on the 1st of March, which is the 61st day of the year.Midnight on the 1st of March, which is the 61st day of the year.Midnight on the 1st of March, which is the 61st day of the year.Midnight on the 1st of March, which is the 61st day of the year.Midnight on the 1st of March, which is the 61st day of the year.Midnight on the 1st of March, which is the 61st day of the year.Midnight on the 1st of March, which is the 61st day of the year.Midnight on the 1st of March, which is the 61st day of the year.Midnight on the 1st of March, which is the 61st day of the year.
How do you find the area of a triangle on a coordinate plane?
you count the number of boxes IN the shape.
How do you find an area for a triangle?
Lenght X Width, then you divide the number by 2.
How do you find the area and perimiter of a triangle?
To find the area of a triangle find the base and the height of the triangle. Then multiply the base by the height, then divide by 2. To find the perimiter of a triangle add together the outside edge of the triangle. To find the area of a triangle find the base and the height of the triangle. Then multiply the base by the height, then divide by 2. To find the perimiter of a triangle add together the outside edge of the triangle.
What if you have a triangle with no number and is trying to find the area?
measure it with a ruler if there arent any numbers...
If two angles of a triangle are complementary find the number of degrees in the third angle?
90
What is the formula to find the square root of a triangle?
This cannot be done as the square root are 2 identical numbers that, when multiplied, equal the original number. A triangle is not a number, therefore, this is question is not rightly asked.
