noun
1 shape
ADJECTIVE
▪ equilateral , isosceles , right ( AmE ), right-angled ( BrE ), scalene
▪ inverted
▪
a large region resembling an inverted ~
VERB + TRIANGLE
▪ construct ( technical ), draw
▪
Use your protractor to construct an equilateral ~.
▪ form
▪ cut sth into
▪
I cut the sandwiches into ~s.
PHRASES
▪ the apex of a ~
2 musical instrument