Ukusikwa kwethayela, okwaziwa nangokuthi umucu wokuvala i-engeli ephozithivu noma umugqa we-engeli ophozithivu, umugqa wokuhlobisa osetshenziselwa ukugoqa kwe-engeli ye-convex engu-90 degree.Kuthatha ipuleti elingezansi njengendawo engaphezulu, futhi lenze indawo eyi-arc emise okwefeni engu-90 degree ohlangothini olulodwa, kanye...
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