why is typing "is that a..." is wrong while "is this a..." is correct?
Both should be accepted, Hebrew doesn't make a clear distinction.
Isn't "oval" אוֹבָלִי? Is אליפסה used for "oval" in preference to אוֹבָלִי?
What is wrong with "Is this a circle or ellipse"? That's how many people would ask this question in English