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Q: Triangle number of 28

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A triangle number is a number that can form an equilateral triangle with that amount of objects. The first ten triangle numbers are 1, 3, 6, 10, 15, 21, 28, 36, 45, and 55.

36 is both a square number and a triangle number as it is:6x6=36andthe square numbers are:1, 3, 6, 10, 15, 21, 28, 36, 45,55, 66, 78.xx

Yes, 28 is a triangular number. It is equal to 7 + 6 + 5 + 4 + 3 + 2 + 1, or (7 x 8) / 2.

Triangle Heart was created on 2000-08-28.

No, 23 is not a triangular number. Here are a few examples of triangular numbers: 21, 28, 55, 45, 78 and 91.

13 is not a triangle number. The 13th triangle number is 91.

Area = 0.5*21*28 = 294 square inches

No because 12+14 = 26 which is less than 28 and so therefore constructing a triangle is impossible.

The fifth triangle number, known as T5 is 15.

Area = 0.5*21*28 = 294 square inches

That's an isosceles triangle.

Yes

No. Triangle numbers are a fixed set of numbers that can't be altered to make one certain number turn into a triangle number.

The 110 degree angle makes this triangle an obtuse triangle.

area of a triangle is half the base times the height .5*22*28=308

The formula for the area (A) of any triangle is A = 1/2base x altitude (or height). The area of a right angled triangle with base = 8 and altitude = 28 is therefore :- A = 1/2 x 8 x 28 = 112 sq inches

A triangular number or triangle number counts the objects that can form an equilateral triangle. 10 objects can be formed into an equilateral triangle.

The right-angle triangle measures 28cm by 35cm. Such a triangle is half of a rectangle.Therefore 28 x 35 = 980cm2 is the area of a rectangle.980 / 2 = 490cm2 will give the area of the triangle (which is 490cm2).

Area of a triangle = 1/2 * base * heightWe have,Area = 28 cm squared, base = 8cmthen,28 = 1/2 * 8 * h28 = 4*hh = 7cm

The area of a triangle can be a rational number or an irrational number depending on its dimensions.

False. I took a quiz and it does not make a right triangle.

The area is 294 square inches.

294 in^2

If the base of a triangle is b and the height of the triangle is h, the area of the triangle is given by the formula: area = 0.5 x b x h.As such, in your case we have 28 = 0.5 x 4 x h, which means that h = 14.

A triangle has 3 sides.