• n. 三角（形）；三角关系；三角形之物；三人一组

tri-, 三，angle,角。

triangle (n.)

late 14c., from Old French triangle (13c.), from Latin triangulum "triangle," noun use of neuter of adjective triangulus "three-cornered, having three angles," from tri- "three" (see tri-) + angulus "corner, angle" (see angle (n.)).

1. The sum of all the angles of a triangle is 180 degrees.

三角形内角总和为180度。

来自柯林斯例句

2. The hypotenuse is the longest side of a right triangle.

直角三角形的斜边是直角三角形中最长的边.

来自《简明英汉词典》

3. The base angles of an isosceles triangle are equal.

等腰三角形的底角相等.

来自《简明英汉词典》

4. He drew a right triangle.

他画了一个直角三角形.

来自《简明英汉词典》

5. The place is a cobbled triangle.

这个地方是一块铺石子的三角地.

来自《简明英汉词典》