The image shows a geometric problem involving a circle with various labeled points and line segments. The task is to name certain elements of the circle, such as radii, chords, and secants.

Here’s a breakdown of the elements:

1. Radii:

• Definition: A radius is a line segment from the center of the circle to any point on the circle.
• In the image: The center of the circle is labeled as $O$. The radii are $OR$, $OM$, and $ON$.

2. Chords:

• Definition: A chord is a line segment with both endpoints on the circle.
• In the image: The chords are $MN$, $PQ$, and $RT$.

3. Secants:

• Definition: A secant is a line that intersects the circle at two points.
• In the image: The secants are $MT$ and $PS$.

Complete Answers:

• All Radii: $OR$, $OM$, $ON$
• All Chords: $MN$, $PQ$, $RT$
• All Secants: $MT$, $PS$

Would you like any further details or explanations on this problem? Here are five related questions you might find helpful:

1. What is the difference between a secant and a tangent?
2. How can you calculate the length of a chord in a circle?
3. What is the relationship between a radius and a tangent at the point of contact?
4. How do you find the midpoint of a chord using the radius?
5. Can you name a situation where a secant becomes a tangent?

Tip: Remember, in any circle, the perpendicular from the center to a chord bisects the chord.