Which of the following are models for perpendicular lines : (b) The lines of a railway track.

Represent the following number on a number line : (b) -10

Show the following numbers on the number line. (b) 1.9

Which of the following does not allow the electric field lines to cross each other ?

Study the diagram. The line l is perpendicular to line m (b) Does PE bisect CG?

Study the diagram. The line l is perpendicular to line m (a) Is CE=EG?

Find the equation of the line whose perpendicular distance from the origin is 4 units and the angle which the normal makes with positive direction of x - axis is 15^(@) .

Two perpendicular tangents to y^(2)=4 a x always intersect on the line

Which of the following groups consists of organs having innermost lining of Columnar epithelium ?

Which of the following transition in H-atom corresponding to absorption line of highest frequency?

Give a definition for each of the following terms. Are there other terms that need to be defined first? What are they and how might you define them ? (i) Parallel lines (ii) Perpendicular lines (iii) Line Segment (iv) Radius of a circle (v) Square