Draw any line segment `bar PQ` .Take any point R not on it.Through R draw a perpendicular to `bar PQ`.

Draw any line segment barAB .Mark any piont M on it.Through M draw a perpendicular to bar AB .(use ruler and compass).

Draw a line l and a pont x on it.Threough x ,draw a line segment bar XY perpendicular to l. NOw draw a perpendicular to bar XY at Y,

Draw any line segment,say bar (AB) .Take any pointC lkying in between A and B.Measure the lengths of AB,BC and AC.Is AB=AC+CB?

Draw a line AB.Take a point C outside it .Through C draw a line parallel to AB,using ruler and compass.

Let l be a line and P be a point not on l. Through P, draw a line m parallel to l. Now join P to any point Q on l. Choose any other point R on m. Through R, draw a line parallel to PQ. Let this meet lat S. What shape do the two sets of parallel lines enclose?

Draw any circle and mark: a segment.

Draw a lineAB.Mark a point C on it.Draw a line CD perpendicular to AB, using ruler and compasses.