# isosceles triangle

*noun*

##
Definition of *isosceles triangle*

*mathematics*

: a triangle in which two sides have the same length

## Word by Word Definitions

: having two equal sides — see triangle illustration

: having the two nonparallel sides equal

: a polygon having three sides — compare spherical triangle

: a percussion instrument consisting of a rod of steel bent into the form of a triangle open at one angle and sounded by striking with a small metal rod

: a drafting instrument consisting of a thin flat right-angled triangle of wood or plastic with acute angles of 45 degrees or of 30 degrees and 60 degrees

## ISOSCELES TRIANGLE Defined for Kids

## isosceles triangle

*noun*isos·ce·les triangle \ī-ˈsä-sə-ˌlēz-\

##
Definition of *isosceles triangle* for Students

**:**a triangle having two sides of equal length

## Seen and Heard

What made you want to look up *isosceles triangle*? Please tell us where you read or heard it (including the quote, if possible).

Writing? Check your grammar now!