To answer the question based on the diagram provided, let's identify the indicated parts using the given figure:

1. Diameter: A line that passes through the center of the circle and touches both ends of the circle. In this figure, the line $EL$ appears to be the diameter.

2. Radius: A line segment from the center of the circle to any point on the circumference. Here, $VQ$ or $QL$ could be the radius.

3. Center: The central point of the circle from which all points on the circumference are equidistant. The point marked $Q$ represents the center.

4. Arc: A curved line that is part of the circumference. The curved line $VA$ represents the arc.

5. Chord: A line segment whose endpoints lie on the circle but does not necessarily pass through the center. $VA$ seems to be the chord in this figure.

6. Semicircle: Half of the circle formed by the diameter. The arc $EL$, combined with the diameter, forms the semicircle.

Would you like further details or have any questions?

Here are 5 related questions to expand on this topic:

1. What is the relationship between a radius and a diameter in a circle?
2. Can a chord also be a diameter?
3. How do you calculate the length of an arc in a circle?
4. What is the formula for the area of a semicircle?
5. How are the central angle and the arc related in a circle?

Tip: The diameter of a circle is always twice the length of the radius.