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matematyka
horizontal, rightangle, alternate exterior angles, convex, full angle, plane, rectangle, intersect, wavy line, obtuse-angled triangle, vertical angles, octagon, interval, pentagon, fluctuate, supplementary angles, ellipse, right-angled triangle, bracket, diagonal, equilateral triangle, cone, square, acute-angled triangle, decagon, mildly, steadily, rhombus, quadrangle, hexagon, cube, circle