They are call Pythagorean triples as for example 3, 4 and 5
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Pick three numbers. If the square of the largest number is equal to the sum of the squares of the other two, then the three numbers could represent the sides of a right triangle.
Three numbers may or may not define a right triangle. Also, the answer will depend on whether the three numbers are the lengths of sides or the measures of angles.
No. There can be no isosceles right angled triangle with all three sides being rational numbers.
No. In order to be the sides of a right triangle, the square of one of the numbers must be the sum of the squares of the other two numbers. (the square of 9) + (the square of 10) = 181 but (the square of 15) = 225 .
sometimes An Isosceles Triangle has 2 equal sides and 2 equal angles. A right triangle could fit the description