Concave vs Convex – When to Choose Which One and Why?

Concave vs convex are both words that are commonly used as adjectives. These words describe the surface or outline of a shape. However, these terms are not often used in a regular conversation. Let 501words tell you its differences.

concave vs convex

The importance of concave and convex exist in science and mathematics. And you will come across these words when talking about mirrors and lenses such as eyeglasses or contact lenses.

Concave vs Convex

Concave is an adjective for an inward curve of a shape. One good example of a concave shape is the side view mirror of a car, which reflects an inner curve. While convex is the opposite of concave, it is an adjective for a shape that shows an outward curve. The ball used to play American football has the outer curve that we can best use as an example.

When to use Concave

The processes related to mirrors, lenses, and reflection can describe through the word concave. Due to how the light reflects a mirror, a concave mirror will make a person look taller. Things such as telescopes, cameras, binoculars, and lenses in eyeglasses use concave lenses.

You can still use the word concave, even if not about science or math. For instance, you see an inward curve like the tummy of a thin person or a pothole. You may describe it as concave.

There are some cases in which concave is used as a descriptive but non-literal sense term. The thing might be exaggeratedly described using the word concave like a synonym of a sunken or thin appearance. Concave is also used as a noun in geometry and mathematics like the type of shape or inward curved line.

When to use Convex

Convex is a noun or a term for a type of shape or an outward curved line that we usually discuss in geometry and mathematics. Here are the examples of concave vs convex used in a sentence:

  • This table is unique because it is sloped outwards and convex.
  • The snowballs are in a convex form that seemed to be made using an ice cream scoop. 
  • He is so thin that his cheeks are concave.
  • My contact lenses are in a concave shape to fit the eyeballs. 

How to Remember the Difference

You can easily remember the difference between concave vs convex. One good tip is to focus on their last syllable. “Cave” for concave and “vex” for convex. The word with an end of “cave” means curving inward. And the one that ends with “vex” which is convex of the opposite that means bent outward.

There are lots of words/phrases that we need to think thrice before we use in writing such as who vs whom, further vs farther, ensure vs insure, and to vs too.

Knowing the differences between these confusing words, you will not just learn how to become a writer or how to write faster. Rather, it is a good start to write content like a pro. So do not just use apps like Grammarly but also, read and study these common confusing terms.

FAQs

What is concave vs convex?

Concave is an adjective for an inward curve of a shape. One good example of a concave shape is the side view mirror of a car, which reflects an inward curve. While convex is the opposite of concave, it is an adjective for a shape that shows an outward curve.

How to remember convex vs concave?

You can easily remember the difference between concave vs convex. One good tip is to focus on their last syllable. “Cave” for concave and “vex” for convex. The word with an end of “cave” means curving inward. And the one that ends with “vex” which is convex of the opposite that means bent outward.

Conclusion

Concave vs convex are words that have something to do with lines and shapes—often used in science, mathematics, or about mirrors or eyeglasses.

Did we make all things clear on how these terms differ? What else do you want us to dig deeper into meaning? Leave your comment below.

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