Ключевые слова: angle, angles, art, bisector, bright, color, colorful, concept, congruent, construction, contour, definition, design, drawing, education, engraved, engraving, equal, geometric, geometry, glowing, graphic, icon, illustration, isolated, isosceles, light, line, linear, lineart, math, mathematics, maths, median, neon, outline, perpendicular, pointer, proofs, property, right, segment, segments, theorem, theorems, triangle, triangles, vertex, vintage,