rhombus

/'rɔmbəs/

Thân thiện

A child draws a rhombus on a piece of paper.

Definition

1. Noun:
   • A flat shape with four straight sides of equal length, where opposite sides are parallel and opposite angles are equal: A rhombus is a specific type of quadrilateral. It is an equilateral parallelogram, meaning all four sides are congruent, but its angles are not necessarily 90 degrees.

Examples of Usage

• Noun:
  • A square is a special type of rhombus where all angles are right angles.
  • The kite's frame was in the shape of a rhombus.
  • She drew a rhombus on the whiteboard to explain the geometric concept.

Advanced Usage

• Mathematical Context: In geometry, a rhombus (plural: rhombi or rhombuses) has diagonals that bisect each other at right angles.
  • The diagonals of a rhombus are perpendicular bisectors of each other.

Variants and Related Words

• Rhomboid (noun): A parallelogram in which adjacent sides are unequal and angles are oblique (not right angles). It is a more general term than rhombus.
  • A rhombus is a special case of a rhomboid where all sides are equal.
• Rhombic (adjective): Having the shape or characteristics of a rhombus.
  • The crystal had a distinct rhombic structure.

Synonyms

• Equilateral quadrilateral: A four-sided polygon with all sides equal in length.
• Diamond (in informal or specific contexts): A rhombus shape, often used when referring to the suit in playing cards or in a general sense. (Note: In strict geometry, "diamond" is not a formal term.)

Related Phrases and Idioms

(This word is a specific geometric term and is not commonly used in idiomatic expressions or phrasal verbs.)

Học thuật

Noun

1. a parallelogram with four equal sides; an oblique-angled equilateral parallelogram

Từ đồng nghĩa

• rhomb
• diamond