The auther of the book 'The elements' is 

Which of the following letters is an example for open curve? 

A ray is a portion of 

The number of points marked in the interior of the triangle is 

Relationship between radius and diameter

The number of end points of a ray is 

Curves are of __________ types. 

In the adjacent figure the side opposite to  is 

Which of the following is the  part of a circle? 

Which of the following is closed curve