Kinds of angles · कोणों के प्रकार
A free Maths lesson for Class 4 children.
When two lines meet at a point, they make an angle.
The point where they meet is called the vertex.
We measure angles in degrees.
A right angle is exactly 90 degrees. The corner of a book is a right angle.
An acute angle is smaller than a right angle.
An obtuse angle is bigger than a right angle but smaller than a straight angle.
A straight angle is 180 degrees. It looks like a straight line.