Skip to main content
Search IntMath
Close

450+ Math Lessons written by Math Professors and Teachers

5 Million+ Students Helped Each Year

1200+ Articles Written by Math Educators and Enthusiasts

Simplifying and Teaching Math for Over 23 Years

Tips, tricks, lessons, and tutoring to help reduce test anxiety and move to the top of the class.

Understanding Angles in Geometry 

Knowing the different types of angles is an important part of geometry. An angle is a figure formed by two rays or line segments that start from the same point and move in opposite directions. They are measured in degrees, and there are several types of angles that we need to learn about. Let's take a look at some of the most common angles. 

Acute Angle 

An acute angle is an angle that measures less than 90 degrees. This type of angle appears as sharp and pointed and looks like a “V” shape when drawn on paper. It can also be described as an angle that is smaller than a right angle. 

 

Right Angle 

A right angle is an angle whose measure is equal to 90 degrees. It appears as an L-shape when drawn on paper, where one of the lines forms a vertical line and one forms a horizontal line. This type of angle has special properties and it can be used to construct other shapes such as squares, rectangles, parallelograms, and trapezoids.  

 

Obtuse Angle 

An obtuse angle is an angle whose measure is larger than 90 degrees but smaller than 180 degrees (one full rotation). This type of angle appears as blunt and rounded when drawn on paper and looks like an upside-down "V" shape. It can also be described as an angle that is larger than a right angle but smaller than a straight line (180 degrees).  

Straight Angle 

A straight angle is an angle whose measure equals 180 degrees (one full rotation). It appears as a straight line when drawn on paper because its two rays are pointing in opposite directions and they form one full rotation together, thus creating the illusion of being one continuous line instead of two separate rays.  

 

Conclusion

As you can see, there are several different types of angles in geometry – acute, right, obtuse, and straight – each with its own unique characteristics and properties. By understanding these different angles, students will be able to better understand how shapes are created in geometry so they can apply their knowledge to problem-solving tasks more efficiently.

 

FAQ

 

What are the types of angles in geometry?

The types of angles in geometry are acute, right, obtuse, and straight. An acute angle measure less than 90 degrees, a right angle measures exactly 90 degrees, an obtuse angle measures between 90 and 180 degrees, and a straight angle measures 180 degrees (one full rotation).

What are the 7 types of angles?

The seven types of angles are acute, right, obtuse, straight, reflex, complementary, and supplementary. An acute angle measures less than 90 degrees, a right angle measures exactly 90 degrees, an obtuse angle measures between 90 and 180 degrees, a straight angle measures 180 degrees (one full rotation), a reflex angle is larger than 180 degrees but less than 360 degrees, complementary angles add up to 90 degrees, and supplementary angles add up to 180 degrees.

What are the 4 types of angles in geometry?

The four types of angles in geometry are acute, right, obtuse, and straight. An acute angle measure less than 90 degrees, a right angle measures exactly 90 degrees, an obtuse angle measures between 90 and 180 degrees, and a straight angle measures 180 degrees (one full rotation).

How many types of angles are there?

There are seven types of angles: acute, right, obtuse, straight, reflex, complementary and supplementary. An acute angle measures less than 90 degrees; right angle measures exactly 90 degrees; an obtuse angle measures between 90 and 180 degrees; a straight angle measures 180 degrees (one full rotation); a reflex angle is larger than 180 degrees but less than 360 degrees; complementary angles add up to 90 degrees, and supplementary angles add up to 180 degrees.

What are the 7 types of angles with examples?

Examples of the seven types of angles are:

- Acute angle: A triangle with all sides measuring less than 90 degrees

- Right angle: An L shape, where one of the lines forms a vertical line and one forms a horizontal line

- Obtuse Angle: An upside-down "V" shape

- Straight Angle: A line that forms a full rotation

- Reflex angle: An angle larger than 180 degrees but less than 360 degrees

- Complementary angles: Angles that add up to 90 degrees

- Supplementary angles: Angles that add up to 180 degrees.

What is an angle and what types of angles?

An angle is a figure formed by two rays that have the same endpoint. The types of angles are acute, right, obtuse, straight, reflex, complementary, and supplementary. An acute angle measures less than 90 degrees; right angle measures exactly 90 degrees; an obtuse angle measures between 90 and 180 degrees; a straight angle measures 180 degrees (one full rotation); a reflex angle is larger than 180 degrees but less than 360 degrees; complementary angles add up to 90 degrees, and supplementary angles add up to 180 degrees.

What are the 9 types of angles?

The nine types of angles are acute, right, obtuse, straight, reflex, complementary, supplementary, linear pair, and vertically opposite. An acute angle measures less than 90 degrees; right angle measures exactly 90 degrees; an obtuse angle measures between 90 and 180 degrees; a straight angle measures 180 degrees (one full rotation); a reflex angle is larger than 180 degrees but less than 360 degrees; complementary angles add up to 90 degrees, supplementary angles add up to 180 degrees, linear pair are two angles that add up to 180 degrees and vertically opposite are two angles with the same measure but different sides.

 

 

24x7 Tutor Chat

Tips, tricks, lessons, and tutoring to help reduce test anxiety and move to the top of the class.