If the triangle contains an angle whose measure is equal to 90 degrees or if the sum of the squares of two of the sides equals the square of the third.
Essentially, if it has a right angle or if a2 + b2 = c2 where c is the longest side of the triangle and a and b are the other two sides, then the triangle must be a right triangle (in Euclidean geometry, that is)
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If the tree sides of the triangles form a Pythagoras triplet then we can say that the angle opposite to the greatest side is a right angle.
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a right triangle has one right angleA triangle with a right angle is a right triangle.
A triangle with 1 right angle is a right angle triangle.
100 degree, 40 degree and 40 degree.
if it has a right angle
The area
If it has a 90 degree angle and two acute angles then it is a right angle triangle.
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One angle (corner) must to 90 degrees.
One of the angles will be 90 degrees.
No way to tell as we don't know an angle or another side.
Transitive Property of Similarity
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A right triangle is one with a right angle... mean it is 90 degrees and the other two angles are usually both 45 degrees, or 30, and 60 degrees. you can tell by looks if there is a corner to the triangle.
If the tree sides of the triangles form a Pythagoras triplet then we can say that the angle opposite to the greatest side is a right angle.