triangle
tri‧an‧gle /ˈtraɪæŋɡəl/
noun [countable]
1. a flat shape with three straight sides and three angles
2. something that is shaped like a triangle:
a triangle of land
3. a musical instrument made of metal bent into the shape of a triangle. You hit it with a metal stick to make a ringing sound.
4. American English a flat plastic object with three sides that has one angle of 90° and is used for drawing angles
SYN set-square British English
■ types of shapes
▪square a shape with four straight sides that are equal in length and four angles of 90 degrees
▪circle a round shape that is like an O
▪semicircle half a circle
▪triangle a shape with three straight sides and three angles
▪rectangle a shape with four straight sides and four angles of 90 degrees
▪oval a shape like a circle, but that is longer than it is wide
▪cylinder an object in the shape of a tube
▪cube a solid object with six equal square sides
▪pyramid a shape with a square base and four triangular sides that meet in a point at the top
▪sphere a shape like a ball
tri‧an‧gle /ˈtraɪæŋɡəl/
noun [countable]1. a flat shape with three straight sides and three angles
2. something that is shaped like a triangle:
3. a musical instrument made of metal bent into the shape of a triangle. You hit it with a metal stick to make a ringing sound.
4. American English a flat plastic object with three sides that has one angle of 90° and is used for drawing angles
SYN set-square British English
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