# Classification of Triangles (On the Basis of Sides, and of Angles) - Right Angled Triangle

## Definition

Right-angled Triangle: A right triangle is a triangle in which one angle has a measurement of 90°.

## Notes

### Right Angled Triangle:

• A right triangle is a triangle in which one angle has a measurement of 90°.
• Right angles are typically denoted by a square drawn at the vertex of the angle that is a right angle.
• The side opposite the right angle of a right triangle is called the hypotenuse. The hypotenuse is the longest side of the right triangle.
• The sides that form the right angle are called legs.

#### Properties Of Right-angled Triangle:

• A right triangle has a 90 degrees angle. This triangle consists of one right angle and two acute angles.
• The right angle is an angle that measures 90° and the acute angles are those angles that measure less than 90°.
• The orthocenter is the point where all three altitudes of the triangle intersect. The orthocenter of the right-angled triangle is located at c.

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