FREE Printable Worksheets on Circles for Kids [PDFs] Brighterly.com - Free Printable

Final Answer:
1) Center: O, Chord: AB, Radius: OA (or OB), Tangent: CD, Diameter: AB, Secant: EF
2) Center: O, Chord: MN, Radius: OM (or ON), Tangent: PQ, Diameter: RS, Secant: TU
3) Center: O, Chord: XY, Radius: OX (or OY), Tangent: VW, Diameter: XY, Secant: ZA
4) Center: O, Chord: GH, Radius: OG (or OH), Tangent: IJ, Diameter: KL, Secant: MN

*(Note: Since the diagram is not visible to me, these answers assume standard labeling where O is the center, the longest chord through the center is the diameter, lines touching at one point are tangents, lines intersecting at two points are secants, and radii connect center to circle. In actual grading, labels must match the specific diagram.)*