8
UNIT 1
Horizontal Lines
Vertical Lines
Observe the following picture.
The horizon forms an imaginary line where the sea appears to meet the sky.
All lines parallel to the horizon are called horizontal lines.
(a) Observetheagpostinthepictureontheright.
 Theagpostformsalinewhichissaidtobevertical.
(b) Drawtwolinesparalleltotheagpost(useyourruler).
Draw two lines parallel to the horizon on the picture (use your ruler).
horizon