Finding the Third Side of a Triangle: 8 & 22

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In summary, using the Triangle Inequality Theorem, we can determine that the range of possibilities for the third side of a triangle with sides 8 and 22 is between 14 and 30, or option A.
  • #1
stealthinstinct
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[3.06] If two sides of a triangle are 8 and 22, what is the range of possibilities for the third side?
 
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  • #2
First, this belongs in the homework help forum, someone will probably move it for you,

second: try drawing the triangle, with various angles between the two known sides, and see what sorts of values you can get for the length of the third side.

Edit:
Aha, someone moved it while I was typing.
 
  • #3
oh, and third, please try to make the title a little more informative than just "help me".
 
  • #4
stealthinstinct said:
[3.06] If two sides of a triangle are 8 and 22, what is the range of possibilities for the third side?

i tried drawing it, it is multiple choise, here are my options:


a. 14<x<30

b. 8<x<22




c. 4<x<18



d. 12<x<18
 
  • #5
I think its A, 22-8 is 14... 22+8 is 30... none of the other ones make sense as possible answeres, am i right?
 
  • #6
ok, i just submitted, i got the problem right, it was A... 300/300 points.. YEAH!
 
  • #7
Well, one side of a triangle is a straight line and so is the shortest distance between the two points: if two sides of the triangle are 8 and 22, then the third side must be less than 8+ 22= 30. Other than that, I can't say.
 
  • #8
stealthinstinct said:
[3.06] If two sides of a triangle are 8 and 22, what is the range of possibilities for the third side?
Check in your Geometry book for "Triangle Inequality Theorem". If a triangle has sides a, b, c; and if sides a and b are known, then this means a+b>c. Can you figure out the rest and apply the theorem?
 

FAQ: Finding the Third Side of a Triangle: 8 & 22

How do you find the third side of a triangle?

To find the third side of a triangle, you can use the Pythagorean theorem which states that in a right triangle, the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides. Simply rearrange the equation to solve for the missing side.

What is the Pythagorean theorem?

The Pythagorean theorem is a mathematical principle that states in a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the other two sides. It is often written as a^2 + b^2 = c^2, where c is the length of the hypotenuse and a and b are the lengths of the other two sides.

How do you know if a triangle is a right triangle?

A right triangle is a triangle in which one of the angles measures 90 degrees. This can be determined by using a protractor to measure the angles of the triangle. If one of the angles is exactly 90 degrees, then the triangle is a right triangle.

Can you use the Pythagorean theorem to find the third side of any triangle?

No, the Pythagorean theorem can only be used to find the third side of a right triangle. For other types of triangles, you will need to use other methods such as the law of cosines or the law of sines.

What is the formula for the Pythagorean theorem?

The formula for the Pythagorean theorem is a^2 + b^2 = c^2, where c is the length of the hypotenuse and a and b are the lengths of the other two sides. It can also be written as c = √(a^2 + b^2) to solve for the length of the hypotenuse.

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