Q: How can you tell if it is a right triangle?

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if it has a right angle

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If it has a 90 degree angle and two acute angles then it is a right angle triangle.

One angle (corner) must to 90 degrees.

No way to tell as we don't know an angle or another side.

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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.

23

One angle (corner) must to 90 degrees.

No way to tell as we don't know an angle or another side.

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.

If a triangle has a right angle, it is a right triangle.

A right triangle is a triangle with a right angle.a right triangle is a triangle with 1 side as a right angle

1. A triangle is a right triangle if and only if it has a right angle. 2. A triangle has a right angle if and only if it is a right triangle.

If it has an obtuse angle