Meanings

isosceles triangle

the three Wuhan Cities

even the patience of a saint eventually runs out

planar trigonometry

to be really angry

to look daggers at someone

two or three days

six-three system of education (six years of elementary school, followed by three years of junior high school)

humming a samisen tune

inverted triangle

triangle

the Three Jewels

equilateral triangle

the three entertainment district enterprises: eating houses, geisha houses, meeting places for assignations, etc.

three sides

shamisen

three wise monkeys (who "see no evil, hear no evil, and speak no evil")

set of three

third place

again and again