Introduction

This page contains the list of lessons on types of angles. It also covers the basics on angles. Each lesson consists of a math video, study tips and practice questions.

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Lessons Description

An angle is formed when two lines diverge from a common point (the vertex). If you are new to angles, you can:

1. Learn about the basics on angles by watching the math video below.

After understanding the basics, the list of lessons below will touch on:

1. Using the protractor to measure angles.
2. Different types of angles.

 

Introduction - Basics on Angles

Math Video Transcript

00:00:04.020 In this lesson, we will learn about the basics on angles. 00:00:09.040 Consider these 2 lines. When these 2 lines meet, an angle is formed. 00:00:17.100 This is the vertex of the angle and these 2 lines are the arms of the angle. 00:00:27.100 Now, this angle has a certain value. 00:00:31.030 This value happens to be 50 degrees. 00:00:35.150 Now, this symbol is the unit for angle. It is called 'degree'. 00:00:42.070 Knowing this, let's rotate this arm, to find out the different values of this angle. 00:00:49.060 Here, we can see that, the lowest value for this angle is 0 degree. 00:00:55.080 Next, let's increase the angle. 00:01:01.110 At this point, we have the angle as 90 degrees. 00:01:06.140 Let's further increase the angle. Now, we have 180 degrees, 270 degrees, finally 360 degrees for a full rotation. 00:01:36.220 Next, let's learn how to name an angle. 00:01:41.190 We can label these 3 vertex as A, B and C respectively. 00:01:52.150 Here, we can see that, this angle is between, A, B, and C. 00:02:04.070 With this, we can write, angle ABC equals to, 60 degrees. 00:02:12.070 Now, if we name it as, angle CBA, it is still the same. 00:02:20.170 Here, note that, the vertex of the angle is always the middle letter. 00:02:27.040 Therefore, we can also write the angle B, equals to 60 degrees provided that, it is not ambiguous. 00:02:37.170 That is all for this lesson. --End of transcript for types of angles--

In this lesson, we will learn how to measure angles using a protractor...

Using a Protractor (Measuring Angles)

In this lesson, we will learn what are acute angles and right angle...

Acute Angles & Right Angle

In this lesson, we will learn about obtuse angles...

Obtuse Angles

In this lesson, we will learn about straight angle...

Straight Angle

In this lesson, we will learn about reflex angles...

Reflex Angles

In this lesson, we will learn that a 360 degree angle is a full angle...

Full Angle