ORTHOGRAPHIC PROJECTION

PREPARED BY G. C. ACCOM SUITABLE FOR

GRADE 9 LEARNERS

TECHNOLOGY

USE A SHEET OF LINED PAPER AND FOLLOW THE INSTRUCTIONS

PLEASE NOTE:We are using lined paper to make the drawings easier for you.

1. DRAW A HORIZONTAL LINE IN THE MIDDLE OF THE PAGE.

2. USE YOUR 45⁰ SET SQUARE TO DRAW A VERTICAL LINE IN THE CENTRE.

3. THE FOUR BLOCKS ON YOUR PAGE ARE CALLED QUADRANTS.

1st Quadrant

2nd Quadrant

3rd Quadrant

4th Quadrant

WE WILL BE DRAWING AN ORTHOGRAPHIC PROJECTION

OF A CUBE THIS MEANS WE WILL BE LOOKING AT THE SAME OBJECT FROM:THE FRONT =  FRONT VIEWImagine you are the object…YOUR front part, your face etc. will be the front view. Same applies to the object.THE SIDE =  SIDE VIEW We are talking of the left side view. Imagine you are the object…YOUR left side, your left arm etc. will be the left view. Same applies to the object.THE TOP =    TOP VIEWThis is what you see when you look at the object from above --- looking down at the object.

USE YOUR 45⁰ SET SQUARE TO DRAW THIS LINE

REMEMBER THIS IS YOUR FRONT VIEW. FRONT

VIEW

SIDE VIEW

Views are always aligned with each other. (Features project from one view to the next)

TOP VIEW

YOU ARE NOW GOING TO PROJECT THE SIDE VIEW AND THE TOP VIEW FROM YOUR FRONT VIEW.