Answer
351.9k+ views
Hint: When two rays intersect each other and form an angle between $0^\circ $ to $90^\circ $, we can say that the angle between them is acute.
When two rays intersect each other and the angle between them is $90^\circ $, we can say that the angle between them is the right angle.
When two rays intersect each other and the angle between them is more than $90^\circ $ and less than $180^\circ $, then the angle is said to be an obtuse angle.
Complete step-by-step solution:
In this question, we are given a measure of an angle and we need to find out which type of angle it is.
Now, angles are the base of geometry and there are 4 types of angles in geometry.
Acute Angle:
When two rays intersect each other and form an angle between $0^\circ $ to $90^\circ $, we can say that the angle between them is acute.
For example: $30^\circ ,45^\circ ,60^\circ $
Right angle:
When two rays intersect each other and the angle between them is $90^\circ $, we can say that the angle between them is the right angle.
Obtuse angles:
When two rays intersect each other and the angle between them is more than $90^\circ $ and less than $180^\circ $, then the angle is said to be obtuse angle.
For example: $95^\circ ,120^\circ ,130^\circ ,150^\circ $
Straight angle:
When the angle between two rays is equal to $180^\circ $, then we can say that the angle is straight angle.
For example:
Now, in our question, we are given an angle with measure $91^\circ $ which is greater than $90^\circ $ and less than $180^\circ $. Therefore, the given angle is obtuse angle.
Note: FOr answering this type of question we should have a theoretical concept of angles.
> When the sum measure of two angles equals to $90^\circ $, then the two angles are said to be complementary angles.
> When the sum measure of two angles equals to $180^\circ $, then the two angles are said to be supplementary angles.
When two rays intersect each other and the angle between them is $90^\circ $, we can say that the angle between them is the right angle.
When two rays intersect each other and the angle between them is more than $90^\circ $ and less than $180^\circ $, then the angle is said to be an obtuse angle.
Complete step-by-step solution:
In this question, we are given a measure of an angle and we need to find out which type of angle it is.
Now, angles are the base of geometry and there are 4 types of angles in geometry.
Acute Angle:
When two rays intersect each other and form an angle between $0^\circ $ to $90^\circ $, we can say that the angle between them is acute.
For example: $30^\circ ,45^\circ ,60^\circ $
![seo images](https://www.vedantu.com/question-sets/06b70171-d369-4edd-869a-d7f33f4d77324358752994064057006.png)
Right angle:
When two rays intersect each other and the angle between them is $90^\circ $, we can say that the angle between them is the right angle.
![seo images](https://www.vedantu.com/question-sets/35ec2787-e684-4fef-ab2d-9de5ccd9ee294738954025000589238.png)
Obtuse angles:
When two rays intersect each other and the angle between them is more than $90^\circ $ and less than $180^\circ $, then the angle is said to be obtuse angle.
For example: $95^\circ ,120^\circ ,130^\circ ,150^\circ $
![seo images](https://www.vedantu.com/question-sets/4fb32683-1fc8-4659-b45e-16d3d7a740117782657871506425438.png)
Straight angle:
When the angle between two rays is equal to $180^\circ $, then we can say that the angle is straight angle.
For example:
![seo images](https://www.vedantu.com/question-sets/39014958-470b-45dd-bc09-15cfae91ab818727625604020542589.png)
Now, in our question, we are given an angle with measure $91^\circ $ which is greater than $90^\circ $ and less than $180^\circ $. Therefore, the given angle is obtuse angle.
![seo images](https://www.vedantu.com/question-sets/21c8fbc7-e1e5-4143-90d7-24f45ef6ef3c5571960775542914526.png)
Note: FOr answering this type of question we should have a theoretical concept of angles.
> When the sum measure of two angles equals to $90^\circ $, then the two angles are said to be complementary angles.
> When the sum measure of two angles equals to $180^\circ $, then the two angles are said to be supplementary angles.
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