triangular
/traɪˈæŋgjʊlə(r)/adjective
1- shaped like a triangle; having three sides and three corners三角形的：
dainty triangular sandwiches.
可口的三角形三明治。
1.1
- involving three people or parties三人之间的; 三方的：
a triangular cricket competition.
三方板球赛。
1.2
- (of a pyramid) having a three-sided base（金字塔）有三角形底的。
派生词
triangularity
nountriangularly
adverb词源
mid 16th cent.: from late Latin triangularis, from Latin triangulum （see TRIANGLE）.