Read Parts Of Circle - Free Printable

Here is the complete solution for each of the four circle diagrams, identifying the center, diameter, radius, chord, and arc as requested.

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🔷 1) First Circle

- Center: `o`
*(The point at the exact middle of the circle.)*

- Diameter: `ab`
*(A straight line passing through the center, connecting two points on the circle — here, from `a` to `b`.)*

- Radius: `oa`, `ob`, `op`, `od`
*(Any line segment from the center to a point on the circle. All these are radii.)*

- Chord: `dc`
*(A line segment connecting two points on the circle but NOT passing through the center.)*

- Arc: `qb` (or `bq`) — the red curved segment shown
*(An arc is a portion of the circle’s circumference. The red curve between `q` and `b` is labeled as an arc.)*

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🔷 2) Second Circle

- Center: `t`
*(The central point marked with a dot.)*

- Diameter: `op`
*(Line passing through center `t`, from `o` to `p` — it's the longest chord and passes through the center.)*

- Radius: `to`, `tp`, `tm`, `tn`, `tq`, `ta`
*(All segments from center `t` to any point on the circle.)*

- Chord: `mn`, `aq`, `op` (also a diameter), `mp`, `nq`, etc.
*(Any line connecting two points on the circle. Since `op` is already listed as diameter, you can list others like `mn` or `aq` as chords.)*
→ Best answer for “Chord” (non-diameter): `mn` or `aq`

- Arc: `mo` (the red curved segment from `m` to `o`)
*(The red arc shown is between points `m` and `o`.)*

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🔷 3) Third Circle

- Center: `o`
*(Marked in the middle.)*

- Diameter: `yz`
*(Passes through center `o`, from `y` to `z`.)*

- Radius: `oy`, `oz`, `os`, `ot`, `oq`
*(All segments from center `o` to points on the circle.)*

- Chord: `st`, `qt`, `qs`
*(Lines connecting two points on the circle without going through the center. `st` is clearly drawn.)*
→ Best answer: `st`

- Arc: `ys` (the red curved segment from `y` to `s`)
*(The red arc shown connects `y` to `s`.)*

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🔷 4) Fourth Circle

- Center: `q`
*(The small red dot in the middle.)*

- Diameter: `ac`
*(Passes through center `q`, from `a` to `c`.)*

- Radius: `qa`, `qc`, `qb`, `qd`
*(Segments from center `q` to any point on the circle.)*

- Chord: `bd`, `ab`, `cd`
*(Any line connecting two points on the circle not passing through center. `bd` is clearly shown.)*
→ Best answer: `bd`

- Arc: `ba` (the red curved segment from `b` to `a`)
*(The red arc shown is from `b` to `a`.)*

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## ✔ Final Answers Summary:

1)

- Center: o
- Diameter: ab
- Radius: oa, ob, op, od
- Chord: dc
- Arc: qb

2)

- Center: t
- Diameter: op
- Radius: to, tp, tm, tn, tq, ta
- Chord: mn (or aq)
- Arc: mo

3)

- Center: o
- Diameter: yz
- Radius: oy, oz, os, ot, oq
- Chord: st
- Arc: ys

4)

- Center: q
- Diameter: ac
- Radius: qa, qc, qb, qd
- Chord: bd
- Arc: ba

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📌 Note for Students:
- A diameter is a special chord that passes through the center.
- A radius is half the diameter and goes from center to edge.
- A chord is any line segment connecting two points on the circle.
- An arc is a curved part of the circle’s edge — often highlighted in red in these worksheets.

Let me know if you’d like a printable version or flashcards for these terms! 📚