In the area of mathematics, mainly in **geometry** , angles are formed by two **rays** or **lines** that begin at the **same point** or that meet by sharing the same **end point** . Angle measures the number of turns between the two arms or **sides** of an angle and is generally measured in **degrees** or **radians** . Where the two rays cross or meet is known as a **vertex** . In geometry, it is very important to know the correct way to identify **obtuse angles** because when the angles have measures **greater than 90**°, it is easier to **visually** identify the type of angles when they are within a **plane** or in **everyday life** .

## What is the obtuse angle?

The obtuse angle is an angle that measures **more** than **90 °** but at the same time measures **less than 180 °. ** It is formed from the **union** that occurs at a **vertex** of two **rays** and has different ways of being measured.

- Definition
- features
- How much is an obtuse angle
- Triangle with obtuse angle
- What objects form an obtuse angle
- Examples

## Definition

To find out about the definition of an obtuse angle, it is also important to know its **etymology** . The word * “angle”* comes from the Latin word

**angulus**, which means ”

**corner**“. It is also related to the Greek word

**ankylοs**meaning

*and the English word*

**“crooked, curved”***“ankle*.

*”*Both Greek and English words come from the Proto-Indo-European root

*which means*

**“ank-“****or**

*“to bend”***.**

*“to bow*

*“*The obtuse angles are the angles that are formed in the same way that the acute or right angles do, in other words, by means of two **rays** that are **joined** at a **vertex** . However, they are also different from them to the **extent** that they possess. The obtuse angles then refer to the angles that measure more than **90º** and less than **180º.**

## features

The main characteristics of the obtuse angle are the following:

- The obtuse angles are those angles that have measures between
**90º**and**180º.** - This type of angle can be
**qualified**depending on its**amplitude**. - The obtuse angles are formed from the
**union**that occurs in a**vertex**of two**rays** - They can be measured by means of a
**protractor**or they can also be used in combination with the gauge and the square. - The obtuse angles have a
**greater amplitude**. - Some of the classifications place obtuse angles between
**oblique angles**, this because they are not right and convex angles because they are less than a straight**angle**.

## How much is an obtuse angle

We can say that an obtuse angle is any angle that measures more than **90 degrees** but less than **180 degrees** , with this we mean that it is the angle that does not measure more than 90 but does not go beyond 180 degrees, being at an **intermediate point** between the 90 and 180 degrees.

## Triangle with obtuse angle

The triangle that has an **obtuse angle** is known by the name of **an obtuse triangle** and is that **triangle** that has an obtuse angle, by this we mean that it has an angle that measures more than **90 °** . Of the three interior angles that the obtuse triangle has, therefore, one of them must be **obtuse** , while the other two angles that the triangle has will then be **acute** , that is, angles that measure less than 90 °.

The obtuse triangles can be considered as **oblique triangles** this because none of their internal angles is considered a **right angle** . **Acute** triangles , those with three **acute angles,** are located within this same rating. If the triangle has a **right angle** , on the contrary, it is called a **right ****triangle** .

It is also important to keep in mind that obtuse triangles can be included in other sets depending on the **characteristics of** their **sides** . The **obtuse** triangle that has **two sides** that measure the **same** and a **third side** that is different is an **isosceles triangle** . If the obtuse triangle has three sides that are different, all of them with different measures, then we are talking about a **scalene triangle** .

## What objects form an obtuse angle

The obtuse angle can be found in different objects in daily life, among them we can mention:

- A compass
- a fan
- a classical dancer