An apparatus to verify experimentally fifteen geometrical theorems has been designed. It consists of wooden circular disk of radius about 15 cms and about two cms thick. A stretched elastic loop is fixed around it so that the thin plastic pipes can be fixed between the edge of the disc and the elastic loop. Narrow plastic pipes through which threads passes in different way for different theorems to be prove experimentally. Weights are hanged at the ends of the thread so that the portion of the thread on the disc between the pipes remains straight as shown in the figure and Protractor to measures the angles.
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