how to find the length of triangle hypotenuse
Answers
Answer:
hypotenuse of a right triangle is given by
h = √()
If you need to find the length of the hypotenuse of a right triangle, you can use the Pythagorean theorem if you know the length of the other two sides. Square the length of the 2 sides, called a and b, then add them together. Take the square root of the result to get the hypotenuse.
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=>Method One of Three:
Using the Pythagorean Theorem:
1.
#Learn the Pythagorean Theorem. The Pythagorean Theorem describes the relationship between the sides of a right triangle.[2] It states that for any right triangle with sides of length a and b, and hypotenuse of length c, a2 + b2 = c2.
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2.
#Make sure that your triangle is a right triangle. The Pythagorean Theorem only works on right triangles, and by definition only right triangles can have a hypotenuse. If your triangle contains one angle that is exactly 90 degrees, it is a right triangle and you can proceed.
Right angles are often notated in textbooks and on tests with a small square in the corner of the angle. This special mark means "90 degrees."
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3.
#Assign variables a, b, and c to the sides of your triangle. The variable "c" will always be assigned to the hypotenuse, or longest side. Choose one of the other sides to be a, and call the other side b (it doesn't matter which is which; the math will turn out the same). Then copy the lengths of a and b into the formula, according to the following example:
If your triangle has sides of 3 and 4, and you have assigned letters to those sides such that a = 3 and b = 4, then you should write your equation out as: 32 + 42 = c2.
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4.
#the square of a number, you simply multiply the number by itself, so a2 = a x a. Find the squares of both a and b, and write them into your formula.
If a = 3, a2 = 3 x 3, or 9. If b = 4, then b2 = 4 x 4, or 16.
When you plug those values into your equation, it should now look like this: 9 + 16 = c2.
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5.
#Add together the values of a2 and b2. Enter this into your equation, and this will give you the value for c2. There is only one step left to go, and you will have that hypotenuse solved!
In our example, 9 + 16 = 25, so you should write down 25 = c2.
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6.
#6
6Find the square root of c2. Use the square root function on your calculator (or your memory of the multiplication table) to find the square root of c2. The answer is the length of your hypotenuse!
6Find the square root of c2. Use the square root function on your calculator (or your memory of the multiplication table) to find the square root of c2. The answer is the length of your hypotenuse!In our example, c2 = 25. The square root of 25 is 5 (5 x 5 = 25, so Sqrt(25) = 5). That means c = 5, the length of our hypotenuse!
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