concave shape

Thân thiện

A concave shape, like a bowl, holds water.

Definition

Noun: A shape or surface that curves or bends inward, like the interior of a bowl or a cave. It is the opposite of a convex shape, which curves outward.

Usage

The term "concave shape" is used to describe the geometric property of an object or surface. It is a formal or technical term common in mathematics, physics, engineering, and design.

Examples

• The concave shape of a satellite dish helps to focus signals to a single point.
• A spoon has a concave shape on one side.
• The architect designed a roof with a slight concave shape to channel rainwater.

Advanced Usage

• In Optics: Lenses that are thinner in the center than at the edges are described as having a concave shape, which causes light rays to diverge (spread apart).
• As a Descriptor: The term can be used descriptively, e.g., "The land formed a concave shape, creating a natural amphitheater."

Variants and Related Words

• Concavity (n): The state or quality of being concave. (e.g., "The concavity of the mirror was precisely calculated.")
• Concave (adj): Describing a surface that is curved inward. This is the adjective form from which "concave shape" is derived. (e.g., "a concave lens")

Synonyms

• Hollow
• Incurved
• Sunken
• Dished

Antonyms

• Convex shape
• Protuberance
• Bulge

Học thuật

Noun

1. a shape that curves or bends inward

Từ đồng nghĩa

• concavity
• incurvation
• incurvature