If you've ever wondered about angles greater than 180 degrees and what they are called, you're in the right place. In the world of geometry, angles play a crucial role in understanding the relationships between shapes and figures. While common angles like right angles (90 degrees) and straight angles (180 degrees) are well known, angles larger than 180 degrees have a specific name too.

Obtuse Angles

An angle greater than 180 degrees is called an obtuse angle. This term is derived from the Latin word "obtusus," which means "blunt" or "dull." When an angle measures more than 90 degrees but less than 180 degrees, it is classified as an obtuse angle. In simpler terms, an obtuse angle is wider than a right angle and doesn't quite form a straight line.

Visualizing Obtuse Angles

To understand obtuse angles better, imagine a triangle. A triangle is formed by three line segments, also called sides, that meet at three points known as vertices. Now, if one angle within the triangle is greater than 90 degrees, it is considered an obtuse angle. This angle will open wider than a right angle, making the triangle appear more stretched on one side.

Examples of Obtuse Angles

Let's take a look at a few examples to solidify our understanding of obtuse angles:

  • An angle measuring 100 degrees is an obtuse angle because it is larger than 90 degrees but smaller than 180 degrees.
  • An angle measuring 150 degrees is also an obtuse angle as it falls within the range of angles greater than 90 degrees but less than 180 degrees.

Not to be Confused with Reflex Angles

It's worth mentioning that obtuse angles should not be confused with reflex angles. While both types of angles are larger than 180 degrees, they differ in their measurements. An obtuse angle measures more than 90 degrees but less than 180 degrees, whereas a reflex angle is greater than 180 degrees but less than 360 degrees. Reflex angles extend beyond a straight line, forming a "bend" in the figure.

In Conclusion

Now you know that an angle greater than 180 degrees is called an obtuse angle. These angles, wider than right angles but narrower than straight angles, have their particular name and are an essential concept in geometry. From understanding triangles to identifying different angle types, our knowledge of obtuse angles allows us to explore the intricacies of shapes and figures more deeply.

For more fascinating math and geometry topics, stay tuned for our upcoming blog posts!

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