Acute Angles & Right Angle

Lesson Icon

Lesson Objective

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

Why icon

About This Lesson

In this lesson, we will learn:

  • What are acute angles.
  • What is a right angle.
  • See some examples on identifying them.

There are many types of angles. As a start, we will learn about these two types of angles. We will proceed to the other types of angles after completing this lesson.

The study tips and math video below will explain more.

acute angle and right angle

Study Tips

Study Tips Icon

Tip #1

If an angle is greater than 0° and lesser than 90°, it is called an acute angle. Below are some examples:

examples on acute angles
Study Tips Icon

Tip #2

Right angle is exactly equals to 90°.

example on right angle

The math videos below will explain more on this.

Math Video

Lesson Icon

Video on Acute Angles

Sponsored Links

Lesson Icon

Math Video Transcript

In this lesson, we will learn about acute angles.

Let's take a look at this angle.

Now, since this angle, is somewhere in between 0 degrees and 90 degrees, it is an angle.

Hence, we can say that an acu. angle, is always greater than 0 degrees, and lesser than 90 degrees.

Let's see some examples to understand this better.

Consider this angle of 80 degrees. Is this an acu. angle? Yes! it is.

How about this angle, of 35 degrees? Yes! It is an acu. angle.

Alright, take a close look at this angle. Is this an acu. angle?

We know that, an acu. angle, is always greater than 0 degrees. This is true, for this angle.

Also, it is always lesser than 90 degrees. Again, this is also true, for this angle.

Yes, it is.

Next, how about this angle?

Clearly, this angle is greater than 90 degrees.

Hence, it is not.

That is all for this lesson.

Lesson Icon

Video on Right Angles

Sponsored Links

Lesson Icon

Math Video Transcript

In this lesson, we will learn about right angle.

By now, we should know that, acu. angles must be in between 0 degrees, and 90 degrees.

So, what happens if the angle is 90 degrees?

When the angle is 90 degrees, it will be called, right angle.

Now, this angle is quite special. It has its own square symbol, to represent it.

To emphasize again, the right angle simply means that, the angle is 90 degrees.

Now, let's see some examples on this.

Is this a right angle? Yes! It is.

How about this? Yes again.

Next, is this a right angle? No, it is not.

That is all for this lesson. Try out the practice question to further your understanding.

Practice Questions & More

Practice Icon

Multiple Choice Questions (MCQ)

Now, let's try some MCQ questions to understand this lesson better.

You can start by going through the series of questions on acute angles and right angle or pick your choice of question below.

Search Icon

Site-Search and Q&A Library

Please feel free to visit the Q&A Library. You can read the Q&As listed in any of the available categories such as Algebra, Graphs, Exponents and more. Also, you can submit math question, share or give comments there.

Practice Icon

Share This Page