Ellipses Quick Check

It seems like you might be looking for a brief overview or questions regarding ellipses. Here's a quick check that covers the basics of ellipses in mathematics and grammar:

### Mathematical Ellipses
1. **Definition**: An ellipse is a set of points in a plane such that the sum of the distances from two fixed points (foci) is constant.
2. **Standard Form**:
- Horizontal ellipse: \(\frac{(x-h)^2}{a^2} + \frac{(y-k)^2}{b^2} = 1\)
- Vertical ellipse: \(\frac{(x-h)^2}{b^2} + \frac{(y-k)^2}{a^2} = 1\)
- Where \((h, k)\) is the center, \(a\) is the semi-major axis, and \(b\) is the semi-minor axis.
3. **Characteristics**:
- Foci: Points located inside the ellipse, along the major axis.
- Major Axis: The longest diameter of the ellipse.
- Minor Axis: The shortest diameter of the ellipse.

### Grammar Ellipses
1. **Definition**: An ellipsis in grammar is a series of three dots (...) that indicates the omission of words or phrases in a sentence.
2. **Usage**:
- To indicate that part of a quote has been left out: "To be, or not to be..."
- To create suspense or a pause in dialogue: "I just... I don't know."
3. **Rules**:
- Ensure clarity remains in the sentence after the omission.
- Use it sparingly to maintain the flow of writing.

### Quick Quiz
1. **Mathematics**: Given the equation \(\frac{(x-3)^2}{16} + \frac{(y+2)^2}{4} = 1\), identify the center, foci, and major/minor axes.

2. **Grammar**: Rewrite the following sentence using an ellipsis to indicate an omission: "I was going to call you, but I changed my mind."

Feel free to provide additional context if you have specific questions or need clarification on ellipses!