Answer Key — HSG.C.A.2

For parents and tutors

Do not share with students before practice tests.

Practice Problems — Sets 1–10

| Set | Guidance | | --- | --- | | Set 1 | Identify and describe relationships among inscribed angles, radii, an… — verify written work and accept reasonable drawings. | | Set 2 | Identify and describe relationships among inscribed angles, radii, an… — verify written work and accept reasonable drawings. | | Set 3 | Identify and describe relationships among inscribed angles, radii, an… — verify written work and accept reasonable drawings. | | Set 4 | Identify and describe relationships among inscribed angles, radii, an… — verify written work and accept reasonable drawings. | | Set 5 | Identify and describe relationships among inscribed angles, radii, an… — verify written work and accept reasonable drawings. | | Set 6 | Identify and describe relationships among inscribed angles, radii, an… — verify written work and accept reasonable drawings. | | Set 7 | Identify and describe relationships among inscribed angles, radii, an… — verify written work and accept reasonable drawings. | | Set 8 | Identify and describe relationships among inscribed angles, radii, an… — verify written work and accept reasonable drawings. | | Set 9 | Identify and describe relationships among inscribed angles, radii, an… — verify written work and accept reasonable drawings. | | Set 10 | Identify and describe relationships among inscribed angles, radii, an… — verify written work and accept reasonable drawings. |

Practice Problems — Sets 11–20

| Set | Guidance | | --- | --- | | Set 11 | Identify and describe relationships among inscribed angles, radii, an… — verify written work and accept reasonable drawings. | | Set 12 | Identify and describe relationships among inscribed angles, radii, an… — verify written work and accept reasonable drawings. | | Set 13 | Identify and describe relationships among inscribed angles, radii, an… — verify written work and accept reasonable drawings. | | Set 14 | Identify and describe relationships among inscribed angles, radii, an… — verify written work and accept reasonable drawings. | | Set 15 | Identify and describe relationships among inscribed angles, radii, an… — verify written work and accept reasonable drawings. | | Set 16 | Identify and describe relationships among inscribed angles, radii, an… — verify written work and accept reasonable drawings. | | Set 17 | Identify and describe relationships among inscribed angles, radii, an… — verify written work and accept reasonable drawings. | | Set 18 | Identify and describe relationships among inscribed angles, radii, an… — verify written work and accept reasonable drawings. | | Set 19 | Identify and describe relationships among inscribed angles, radii, an… — verify written work and accept reasonable drawings. | | Set 20 | Identify and describe relationships among inscribed angles, radii, an… — verify written work and accept reasonable drawings. |

Review tiers 1–10

Checklists are parent-judged.
Written items: verify against practice set patterns.
Standard text: Identify and describe relationships among inscribed angles, radii, and chords. Include the relationship between central, inscribed, and circumscribed angles; inscribed angles on a diameter are right angles; the radius of a circle is perpendicular to the tangent where the radius intersects the circle.

Practice test scoring

| Tier | Pass guidance | | --- | --- | | 1–3 | Most oral tasks smooth; majority of written correct | | 4–6 | 7/10+ total with clear understanding | | 7–8 | 9/12+ with explanations | | 9–10 | Near-perfect; ready to move on |

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