### Theory:

Anything that is not straight is referred to as a curve.
There are different types of curves. Some of which are:
• Simple curve
• Non-simple curve
• Open curve
• Closed curve

A curve that does not cross itself is called a simple curve.

A curve that crosses its own path is called a non-simple curve.

An open curve is a curve whose endpoints do not meet at any point. It has two endpoints.

A closed curve is a curve, which has no endpoints and enclosed an area.

A closed curve contains $$3$$ parts. They are:
• Interior of the curve
• Exterior of the curve
• Boundary of the curve

1. Interior of the curve:

The inside / inner region of the curve is referred to as the interior of the curve. In the above figure, point $$A$$ lies on the interior of the curve.

2. Exterior of the curve:

The outside / outer region of the curve referred to as the exterior of the curve. In the above figure, point $$B$$ lies on the exterior of the curve.

3Boundary of the curve:

The curve, which divides the interior and exterior part, is called a boundary of the curve. In the above figure, point $$C$$ lies on the boundary of the curve.

Important!
The interior and boundary of the curve together are called "the region" of the curves.
The text passage provides definitions and descriptions of different types of curves, including simple, non-simple, open, and closed curves. It also explains the parts of a closed curve, such as the interior, exterior, and boundary.
no_question
Given a text passage, determine:
    1. If it contains a mathematical question (including word problems or calculations)
    2. If an answer to that mathematical question is provided in the text

First, describe the content structure you found in 1-2 sentences.

Then provide your analysis in the following format:
TYPE: <one of the following values>
- NO_QUESTION
- SINGLE_QUESTION
- SINGLE_QUESTION_WITH_ANSWER
- MULTIPLE_QUESTIONS
- MULTIPLE_QUESTIONS_WITH_ANSWERS
system
### Theory:

Anything that is not straight is referred to as a curve.
There are different types of curves. Some of which are:
• Simple curve
• Non-simple curve
• Open curve
• Closed curve

A curve that does not cross itself is called a simple curve.

A curve that crosses its own path is called a non-simple curve.

An open curve is a curve whose endpoints do not meet at any point. It has two endpoints.

A closed curve is a curve, which has no endpoints and enclosed an area.

A closed curve contains $$3$$ parts. They are:
• Interior of the curve
• Exterior of the curve
• Boundary of the curve

1. Interior of the curve:

The inside / inner region of the curve is referred to as the interior of the curve. In the above figure, point $$A$$ lies on the interior of the curve.

2. Exterior of the curve:

The outside / outer region of the curve referred to as the exterior of the curve. In the above figure, point $$B$$ lies on the exterior of the curve.

3Boundary of the curve:

The curve, which divides the interior and exterior part, is called a boundary of the curve. In the above figure, point $$C$$ lies on the boundary of the curve.

Important!
The interior and boundary of the curve together are called "the region" of the curves.
user
The text passage provides definitions and descriptions of different types of curves, including simple, non-simple, open, and closed curves. It also explains the parts of a closed curve, such as the interior, exterior, and boundary.

TYPE: NO_QUESTION