Learn how to identify different types of lines, including vertical, horizontal, parallel and perpendicular. Parallel and perpendicular lines Discover the difference between parallel and perpendicular ...

The radius of a circle is a line, which starts at the centre of the circle and ends on a point on the circumference. The radius is half the length of the diameter. Looking at the diagram, since OA and ...

Generally students are advised to read the NCERT books while preparing for board exams or any competitive exam. NCERT books are best known for explaining the concepts in a simple way for better ...