# Thread: What is this figure called?

1. ## What is this figure called?

Hi!

For a geometric abstraction, I created this figure using a graphics application.

It looks like a filled half parabola. In geometry, what is it called?

Thank you!

Dr. T

2. ## Re: What is this figure called?

It doesn't really look like a parabola. But, hey, it's a piece of art that you made so you can call it anything you wish. How about "bloody fingernail"?

3. ## Re: What is this figure called?

Meet Arthur.

He goes by "Art" for short.

4. ## Re: What is this figure called?

Arthur is li'l Red Riding Hood'd bf?

5. ## Re: What is this figure called?

Originally Posted by DoctorTR
Hi!

For a geometric abstraction, I created this figure using a graphics application.

It looks like a filled half parabola. In geometry, what is it called?

Thank you!

Dr. T

Why not call it a parabola? It looks like a parabola to me.

6. ## Re: What is this figure called?

Originally Posted by harpazo
Why not call it a parabola? It looks like a parabola to me.
For one thing, it's finite in size, and a parabola is not. Also, the figure
contains an interior, which the parabola is just the curve.

7. ## Re: What is this figure called?

Even for the outside, how could you tell whether it is a parabola or part of an ellipse?

8. ## Re: What is this figure called?

Originally Posted by greg1313
For one thing, it's finite in size, and a parabola is not. Also, the figure
contains an interior, which the parabola is just the curve.
I was thinking about the thick, black curve in the U shape.