Step 1 - I selected alternate faces of the ring polygon provided, leaving a single segment spacing between each of the selected faces.
Step 2 - I used the extrude tool to extrude the selected faces, to form the teeth of the gear.
Step 3 - Still using the extrude tool, I scaled the teeth of each gear to have a pointier end as an additional detail
Step 4 - Changed to object mode and my gear is complete!
Reflection
I found this exercise quite simple but still helpful at the same time. I taught me how to come up with a variety of designs just by scaling. Take the second and the last model for example, both of the models look like gears but because of the scale tool I was able to model both gears to have different shaped teeth, hence giving me a wider variety of designs.
Research
Here are some of the videos that I saw on youtube, which gave me a clearer understanding and helped me along with this exercise.
Move, scale and rotate tool - http://www.youtube.com/watch?v=CxGnx1jLxbY
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