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If you know all the side lengths then you can use the Pythagorean Theorem. The theorem states that a^2+b^2=c^2 when c=the hypotenuse or the side opposite the suspected right angle. So multiply the two shorter sides by themselves (a*a+b*b) and then add them together. Finally, take the square root of this number and if it equals the length of the hypotenuse then the triangle is right. A triangle with the side lengths 3,4, and 5 or multiples of that (i.e. 9, 16, and 25) are right triangles.

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Q: How do you prove a right triangle?
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Related questions

How do you prove a right angle triangle?

You cannot prove "a right angle triangle". You may or may not be able to prove statements about right angled triangles but that will depend on the particular statement.


Does pythagorean theorem prove a triangle to be a right triangle?

Yes


How to prove an isosceles triangle with one angle bisector?

What have we got to prove? Whether we have to prove a triangle as an Isoseles triangle or prove a property of an isoseles triangle. Hey, do u go to ALHS, i had that same problem on my test today. Greenehornet15@yahoo.com


Could 3 5 and 7 represent the length of the sides of a right triangle?

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Can you show how a right triangle has one line of symmetry?

the only way for a right triangle to have a line of symmetry, is if the legs of the triangle are congruent. Or you can show that both non-right angles are congruent (45 degrees). you may also prove that the altitude of the triangle bisects the hypotenuse or that it equals 1/2 of the hypotenuse.


How do you prove the pythagorean theorem?

For any right angle triangle its hypotenuse when squared is equal to the sum of its squared sides.


What type of triangle proves the pythagorean theorerm?

The Pythagorean Theorem applies only to right triangles. (But they don't prove it.)


Can you prove that angle B is the only right angle in triangle ABC?

The sum of the internal angles of a triangle is 180º. If B is a right angle it has 90º, so there are only 90º left for the other two angles, meaning that they cannot be right!


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How can proving two triangles congruent can help prove parts of the triangle congruent?

When you prove a triangle is congruent to another, it can help you prove parts of the triangle congruent by checking the ratio between all sides and angles. Thank you for asking


What kind of triangle has a right angle?

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