triangle

1) треугольник

2) треугольный
– acute triangle
– acute-angled triangle
– admittance triangle
– bilge triangle
– boundary triangle
– cevian of a triangle
– circle of a triangle
– circumscribed triangle
– construct triangle
– current triangle
– ellipsoidal triangle
– equidimensional triangle
– equilateral triangle
– excenter of triangle
– excess of a triangle
– excess of triangle
– gutter triangle
– impedance triangle
– inscribe triangle
– inscribed triangle
– isosceles triangle
– leg of a right triangle
– median of a triangle
– navigational triangle
– oblique triangle
– obtuse triangle
– obtuse-angled triangle
– parallactic triangle
– plane triangle
– polar triangle
– right triangle
– right-angled triangle
– scalene triangle
– side of triangle
– solve triangle
– triangle axiom
– triangle inequality
– triangle of errors
– triangle of forces
– triangle of reference
– triangle of velocities
– triangle strength
– vertex of triangle
– voltage triangle

deck stringer triangle — стрингерный угольник

set triangle against T-square — прикладывать угольник к рейсшине

slip triangle on T-square — перемещать угольник по рейсшине