What if you need to draw a circle, and a compass at hand is not! To get out of this situation by making a simple compass of the bent and strapped to the pencil in the right place for a stylus pen, as shown in the figure.
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You can make a simple model of the electric vehicle that will run on batteries. This will require: microelectrochemical PD-12A, flat battery, 4.5 V, two coils of No. 10 without thread,...
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Offer to improve a closure for closing window frames: it a metal plate with a slot for fixing the "tongue" needs to be set obliquely, as shown in the figure. Now, if zakryvanii frame in...
