ISOMETRIC CIRCLES AND CYLINDERS - Year 9 Mathematics
ISOMETRIC CIRCLES AND CYLINDERS Drawing a basic isometric shape such as cube can be difficult the first time you attempt to draw it using a T-Square and 30 degree Set Square. However, after a few attempts the technique for drawing them can be mastered quite easily. On the other hand - isometric circles and cylinders are more difficult and drawing
them requires practice. Your work sheet should look like this:- ISOMETRIC CIRCLES AND CYLINDERS
1. Draw the original circle of radius 40mm with a pair of compasses and enclose it in a box. Add vertical and horizontal guidelines 40mm
2. Number the vertical lines 10mm apart (these are called 'ordinate lines') as shown on the diagram opposite. 10mm
Your work sheet should look like this:- ISOMETRIC CIRCLES AND CYLINDERS 3. Draw the grid in isometric using a 30 degree set
square, being careful to use the same measurements as the original grid which surrounds the circle. 4. To draw the circle in isometric
projection simply measure each distance down each vertical line on the normal grid and transfer it to the isometric grid. On the diagrams opposite - distance 'x' on guideline
3 has been transferred to the isometric grid. This is repeated for each of the guidelines 1,2, and 4. Your work sheet should look like this:-
ISOMETRIC CIRCLES AND CYLINDERS 5. Continue around the isometric circle 'plotting' transferring distances from the original grid to the isometric grid - until
the circle is complete. Your work sheet should look like this:- ISOMETRIC CIRCLES AND CYLINDERS
CREATING A CYLINDER 6. Having successfully drawn the isometric circle developing it further to change it into a cylinder is relatively easy. Draw 30 degree guidelines out from the isometric circle with your set square as shown in
the diagram 7. Measure the distance 30mm representing the 'thickness' of the cylinder along each 30 degree guideline. Start drawing a curve through each of
the points. Your work sheet should look like this:- ISOMETRIC CIRCLES AND CYLINDERS
8. Draw the curve through each of the points to produce the final cylinder shade. Your work sheet should look like this:-
ISOMETRIC CIRCLES AND CYLINDERS This view 160
Draw a block in isometric to theses given dimensions with a 100mm hole
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