to locate by means of triangulation / to pit two others against each other in order to achieve a desired outcome or to gain an advantage; to "play both ends against the middle"

triangular

(uncountable, surveying) A technique in which distances and directions are estimated from an accurately measured baseline and the principles of trigonometry; (countable) an instance of the use of this technique.

(informal) To work; to be successful; to solve a problem; to be sufficient or adequate to fulfill a purpose.

(pathology) A disease characterized by headache, chills, fever, and soreness of muscles, caused by the presence of nematodes of genus Trichinella in the intestines and muscular tissues.

(cycling, motor racing) An unpaced race in which riders or teams leaving at regular intervals are timed over a preset course or distance, the winner being the rider or team to finish in the fastest time.

An elected official in Ancient Rome. / (Military tribune) (Latin tribunus militum, "tribune of the soldiers"): an officer of the Roman army who ranked below the legate and above the centurion.

(uncountable) Deception or underhanded behavior. / (uncountable) The art of dressing up; imposture. / (uncountable) Artifice; the use of one or more stratagems.

(uranography) A bright asterism of the northern summer sky. Its corners are the three 1st-magnitude stars Altair (α Aql), Deneb (α Cyg), and Vega (α Lyr).

(law) An archaic practice by which a person accused of a crime could prove his innocence by his survival of physically painful tests.