by Yogi P - September 24, 2023

An angle is a geometrical shape formed by two rays or lines that meet at a common point. The point where the rays or lines meet is called the vertex of the angle. Angles are measured in degrees (°). A complete circle has 360 degrees.

Types of angles

There are different types of angles in maths, classified based on their measurement.

The most common types of angles are:

Acute angle: An acute angle is an angle that measures less than 90 degrees or we can say angles from 0 to 90 degree are acute angles.

Obtuse angle: An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees.

Right angle: A right angle is an angle that measures exactly 90 degrees.

Straight angle: A straight angle is an angle that measures exactly 180 degrees.

Reflex angle: A reflex angle is an angle that measures more than 180 degrees but less than 360 degrees.

Full angle: A full angle is an angle that measures exactly 360 degrees.

In addition to the above types of angles, there are also some special types of angles, such as:

• Complementary angles: Complementary angles are two angles that add up to 90 degrees.
• Supplementary angles: Supplementary angles are two angles that add up to 180 degrees.
• Vertically opposite angles: Vertically opposite angles are two angles that are formed when two intersecting lines cross each other. Vertically opposite angles are always equal.

Examples of angles

Here are some examples of angles in the real world:

• The angle between the hands of a clock at 09:00 noon is a right angle.
• The angle between the two sides of a door frame is a right angle.
• The angle between the two sides of a triangle can be acute, right, or obtuse.
• The angle between the two sides of a square is a right angle.
• The angle between the two sides of a rectangle is a right angle.

Types of angles in Hindi

The Hindi terms for the different types of angles are:

• Acute angle: नुकीला कोण
• Right angle: समकोण
• Obtuse angle: मंद कोण
• Straight angle: सीधा कोण
• Reflex angle: अवतल कोण
• Full angle: पूर्ण कोण

Types of triangle based on angles

Triangles can also be classified based on their angles. The different types of triangle based on angles are:

• Acute triangle: An acute angle triangle is a triangle in which all three angles are acute angles.
• Right triangle: A right triangle is a triangle that has one right angle.
• Obtuse triangle: An obtuse triangle is a triangle that has one obtuse angle.

Types of camera angles

Camera angles can be used to create different effects in films and videos. Some of the most common types of camera angles are:

• High angle: A high angle shot is taken from above the subject, looking down. This type of shot can make the subject look smaller or weaker.
• Low angle: A low angle shot is taken from below the subject, looking up. This type of shot can make the subject look larger or more powerful.
• Eye level: An eye level shot is taken from the same level as the subject’s eyes. This type of shot is often used to create a more natural and realistic look.

Conclusion:

Angles are an important part of mathematics and geometry, and they have many applications in the real world. By understanding the different types of angle and how to measure them, you can better appreciate their importance and use them in your own work.

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Some important questions for exams

1. What is the point called where the two rays or lines meet to form an angle?

a) Degree
b) Vertex
c) Axis
d) Pivot
Answer: b) Vertex

2. How many degrees does a complete circle have?

a) 180 degrees
b) 90 degrees
c) 360 degrees
d) 270 degrees
Answer: c) 360 degrees

3. What type of angle measures less than 90 degrees?

a) Obtuse Angle
b) Acute Angle
c) Right Angle
d) Reflex Angle
Answer: b) Acute Angle

4. Which angle measures exactly 180 degrees?

a) Right Angle
b) Straight Angle
c) Acute Angle
d) Reflex Angle
Answer: b) Straight Angle

5. What type of angle measures more than 180 degrees but less than 360 degrees?

a) Acute Angle
b) Obtuse Angle
c) Reflex Angle
d) Right Angle
Answer: c) Reflex Angle

6. What is the Hindi term for an Acute Angle?

a) समकोण
b) मंद कोण
c) नुकीला कोण
d) पूर्ण कोण
Answer: c) नुकीला कोण

7. Which triangle has all three angles as acute angles?

a) Acute Triangle
b) Right Triangle
c) Obtuse Triangle
d) Equilateral Triangle
Answer: a) Acute Triangle

8. What type of camera angle is taken from below the subject, looking up?

a) High Angle
b) Low Angle
c) Eye Level
d) Overhead
Answer: b) Low Angle

9. Which angle is formed between the hands of a clock at 09:00 noon?

a) Acute Angle
b) Right Angle
c) Obtuse Angle
d) Straight Angle
Answer: b) Right Angle

10. What are vertically opposite angles?

a) Angles that add up to 180 degrees
b) Angles that add up to 90 degrees
c) Angles that are always equal
d) Angles that are always supplementary
Answer: c) Angles that are always equal