Ukunciphisa iithayile, okwakwaziwa ngokuba ngumcu wokuvala i-engile ekhabayo okanye umcu we-engile echanekileyo, ngumgca wokuhombisa osetyenziselwa ukusonga i-engile ye-90 ye-convex yeethayile.Ithatha ipleyiti esezantsi njengomphezulu, kwaye yenza umphezulu we-arc we-90-degree-fan-shape kwicala elinye, kunye...
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