i. üçgen. Is this an equilateral triangle? (Bu eşkenar üçgen mi?)

An instrument of percussion, usually made of a rod of
steel, bent into the form of a triangle, open at one angle, and sounded
by being struck with a small metallic rod.

A draughtsman’s square in the form of a right-angled
triangle.

A kind of frame formed of three poles stuck in the ground
and united at the top, to which soldiers were bound when undergoing
corporal punishment, – now disused.

A small constellation situated between Aries and
Andromeda.

A small constellation near the South Pole, containing
three bright stars.