The sister with the cutting it took to draw a circle the diameter of which more than allows a compass. Rescued… a school ruler, which my dad drilled hole (see figure). The first of them, playing the role axis, is inserted a pin or awl, and the other to the desired distance from the tip of a pencil. Please circle any, up to 30 cm radius.
A. KOLTSOV, Arkalyk, Kazakhstan
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