I°) Definition of
a right triangle
| A rectangle triangle is a triangle that has a right angle.
The triangle ABC below is right angled at A. |
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[AC] is perpendicular to [AB]. |
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II°) Median and circumcircle
| In a right triangle, the median on the hypotenuse measuring half of the hypotenuse. | ||
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O middle of [BC], then B0 = C0 = A0 0 is the center of the circle circumscribed to ABC. |
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If point A is the half-circle diameter [BC], while ABC is rectangle in A. |
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