Acute Angles & Right Angle
In this lesson, we will learn what are acute angles and right angle.
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.
If an angle is greater than 0° and lesser than 90°, it is called an acute angle. Below are some examples:
Right angle is exactly equals to 90°.
The math videos below will explain more on this.
Video on Acute Angles
Acute Angles from MathExpression.com on Vimeo.
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.
Video on Right Angles
Right Angles from MathExpression.com on Vimeo.
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
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.
- Question 1 on identifying acute angles.
- Question 1 on identifying right angles.
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