# What is the side of a right triangle called?

## What is the side of a right triangle called?

hypotenuse

In a right triangle, the hypotenuse is the longest side, an “opposite” side is the one across from a given angle, and an “adjacent” side is next to a given angle.

## What are the sides of a triangle called?

The side opposite to the right angle is the hypotenuse, the longest side of the triangle. The other two sides are called the legs or catheti (singular: cathetus) of the triangle.

**Why are the sides of a right triangle called legs?**

In a right triangle, the two sides that aren’t the hypotenuse are known as legs. Because there are two of them, (as opposed to the three sides of a non-right triangle) they are named by analogy with the two legs of the human body.

### What is the name of a right angle?

The straight lines which form right angles are called perpendicular.

### What is the leg of a right triangle?

a and b are the “legs” of the triangle, which are the two sides that make up the 90 degree angle. c is the “hypotenuse” of the triangle, and is the side of the triangle that is opposite the right angle (another way to say a 90º angle is “right angle”). The hypotenuse is also the longest side of the right triangle.

**What are the 3 parts of a triangle?**

All triangles have three sides and three corners (angles). The point where two sides of a triangle meet is called a vertex. The base of a triangle can be any one of its three sides, but it is usually the bottom one.

#### Does a triangle have 4 sides?

The triangle has three (3) sides. The triangle is a polygon that contains three sides and three inner angles and three vertices. Additional Information: A triangle is a primitive form of geometry (polygon) that can only have three sides in its simplest form.

#### What do you call the legs of a triangle?

In an isosceles triangle, the two equal sides are called legs, and the third side is called the base. The angle formed by the two equal sides is called the vertex angle. In a right triangle, the side opposite the right angle is called the hypotenuse, and the other two sides are called legs (Figure 2 ).

**What is a leg in a right triangle?**

A leg of a triangle is one of its sides. For a right triangle, the term “leg” generally refers to a side other than the one opposite the right angle (which is termed the hypotenuse). Legs are also known as catheti.

## Why is it called a right angle?

The term right in right angle comes from the meaning of right as proper, or in accordance to justice or equality. It comes from the way a right angle was originally defined. When two straight lines intersect they form two angles.

## Which side is a leg?

The legs (or catheti; singular: cathetus) are the sides in a right triangle that form its right angle (90°). The side opposite the right angle is called the hypotenuse. The legs (or catheti) are the two shorter sides of the triangle.

**What are the sides of a right triangle called?**

The sides of a right triangle are commonly referred to with the variables a, b, and c, where c is the hypotenuse and a and b are the lengths of the shorter sides.

### Is there an unknown side in a right-angled triangle?

We can find an unknown side in a right-angled triangle when we know: one length, and one angle (apart from the right angle, that is).

### How to find the right triangle side lengths?

Given angle and hypotenuse Apply the law of sines or trigonometry to find the right triangle side lengths: a = c * sin (α) or a = c * cos (β) b = c * sin (β) or b = c * cos (α)

**What can you do with a 45° 45° 90° triangle?**

Like the 30°-60°-90° triangle, knowing one side length allows you to determine the lengths of the other sides of a 45°-45°-90° triangle. 45°-45°-90° triangles can be used to evaluate trigonometric functions for multiples of π/4.