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Wiktionary
right triangle

n. (context geometry English) A triangle having a right angle as one of its interior angles.

WordNet
right triangle

n. a triangle with one right angle [syn: right-angled triangle] [ant: oblique triangle]

Wikipedia
Right triangle

A right triangle ( American English) or right-angled triangle ( British English) is a triangle in which one angle is a right angle (that is, a 90- degree angle). The relation between the sides and angles of a right triangle is the basis for trigonometry.

The side opposite the right angle is called the hypotenuse (side c in the figure). The sides adjacent to the right angle are called legs (or catheti, singular: cathetus). Side a may be identified as the side adjacent to angle B and opposed to (or opposite) angle A, while side b is the side adjacent to angle A and opposed to angle B.

If the lengths of all three sides of a right triangle are integers, the triangle is said to be a Pythagorean triangle and its side lengths are collectively known as a Pythagorean triple.

Usage examples of "right triangle".

Marya, this is not the Pythagorean Theorem, which states that the square of the hypotenuse of a right triangle.

Somebody thought of a huge pine forest planted in Siberia in the form of a right triangle.

We could plant a right triangle of pine trees with a square of blue spruce attached to each side.

Yet anyone who had only seen it on the flat surface of a map, since it cut directly across the hypotenuse where the Great North Road and the road from Hali were the two straight legs of a right triangle, might consider it a short cut.

The rooms had been hollowed out at the apexes of a right triangle and were connected by great excavated passages big enough to accommodate an extensive distribution grid.

However, it would more correctly read, the sum of the two squared sides of a right triangle equals the square of the hypotenuse.

Tanayoka sent for them, and a moment later she was carefully drawing a right triangle and writing Pythagoras's theorem beneath it.

The log now formed the hypoteneuse of a right triangle whose straight sides were the platform of the siege works and the face of the tower.

Nearly three thousand years ago, a visionary mathematician named Pythagoras had developed a theorem that related the sides of a right triangle to the length of the hypotenuse-the distance between two end points.