1) треугольник
2) (чертёжный) угольник
3) дорож. знак треугольной формы
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- 45° right triangle
- acute-angled triangle
- acute triangle
- breakdown triangle
- circumscribed triangle
- color triangle
- colorimetric triangle
- congruent triangles
- equilateral triangle
- impedance triangle
- inscribed triangle
- isoscales triangle
- obtuse-angled triangle
- obtuse triangle
- plane triangle
- polar triangle
- reversing triangle
- right-angled triangle
- right triangle
- scalene triangle
- similar triangles
- sliding triangle
- soil triangle
- spherical triangle