# Types of Angles and Triangles with Videos and Game (Quiz) to Practice

Hello guys, hope you all are doing great and staying safe. Let’s talk about Angles and Triangles, and in the end, you will also find a cool game/tool to practice your knowledge. So let’s get started.

### What is an Angle?

An Angle is made from 2 rays that meet at some point (they have same end point). These 2 rays are called sides and the endpoint is called vertex. Angles are measured with the help pf protractor in degrees. Here are some examples of angles.

## What are the Types of Angles?

**Right Angles:**Angles that are equal to 90-degree exactly are known as Right Angles.

**Acute Angles:**All angles with a value less than 90-degree are Acute Angles. In other words: These Angles are smaller than Right Angles.

**Obtuse Angles:**Angles with a value more than 90-degree but less than 180-degree are Obtuse Angles.

**Equal Angles or Flat Angle or Straight Line Angle**: Angles that are equal to 180-degree are known as Straight Angles.

**Zero Angles:**These angles are those angles that never made an angle or never turned. This means all angles equal to 0-degree are called Zero angles.

**Full Angles or Full Rotation Angles or Complete Angles:**An angle that completes its full turn (an angle equal to 360-degree) is known as a Full Angle.

**Oblique Angles:**Any angle that is not equal to 90-degree (not a right angle) and also not a multiple or 90-degree is called Oblique angle.

**Reflex Angle:**Angles with a value more than 180-degree and less than 360-degree are called Reflex Angles.

## Classification of Angles: Videos

## What is a Triangle?

A Polygon with 3 vertices and 3 edges is called a triangle. A triangle always has 3 angles. Here is an example of Triangle:

## What are the types are of Triangle?

**Right Triangle:**A Triangle with one right angle. (Such Triangles always have one angle as 90-degree).

**Acute Triangle:**All three angles of such Triangles are Acute Angles (Less than 90-degree).

**Obtuse Triangle:**One Angle of such Triangles have an Obtuse Angle (More than 90-degree, but less than 180-degree).

**Scalene Triangle:**None of the sides matches each other (all sides are different).

**Isosceles Triangle:**Such Triangles have at least 2 sides of the same length.

**Equilateral Triangle:**All sides of such Triangles have the same length.

## Classification of Triangles: Video

So, I hope the concept of the Triangles and the Angles are now cleared. If you have any question, you can certainly ask in the comment section.

## Game (Quiz) To Practice What You Have Learnt

*Important Node:* Every time game ends, it asks you if you want to play again. Don’t click on it. You have to refresh/reload this page. If you click, it will take you to another website where this game doesn’t load/support.

*Important Node:*

**How to play:** Just click on the Angle or Triangle and then you will get questions attached to the mouse pointer. You just need to click on the correct answer. The relaxed mode gives you unlimited try and the Timed method gives you limited time.