Answer Key — HSG.CO.B.7

For parents and tutors

Do not share with students before practice tests.

Practice Problems — Sets 1–10

| Set | Guidance | | --- | --- | | Set 1 | Use the definition of congruence in terms of rigid motions to show th… — verify written work and accept reasonable drawings. | | Set 2 | Use the definition of congruence in terms of rigid motions to show th… — verify written work and accept reasonable drawings. | | Set 3 | Use the definition of congruence in terms of rigid motions to show th… — verify written work and accept reasonable drawings. | | Set 4 | Use the definition of congruence in terms of rigid motions to show th… — verify written work and accept reasonable drawings. | | Set 5 | Use the definition of congruence in terms of rigid motions to show th… — verify written work and accept reasonable drawings. | | Set 6 | Use the definition of congruence in terms of rigid motions to show th… — verify written work and accept reasonable drawings. | | Set 7 | Use the definition of congruence in terms of rigid motions to show th… — verify written work and accept reasonable drawings. | | Set 8 | Use the definition of congruence in terms of rigid motions to show th… — verify written work and accept reasonable drawings. | | Set 9 | Use the definition of congruence in terms of rigid motions to show th… — verify written work and accept reasonable drawings. | | Set 10 | Use the definition of congruence in terms of rigid motions to show th… — verify written work and accept reasonable drawings. |

Practice Problems — Sets 11–20

| Set | Guidance | | --- | --- | | Set 11 | Use the definition of congruence in terms of rigid motions to show th… — verify written work and accept reasonable drawings. | | Set 12 | Use the definition of congruence in terms of rigid motions to show th… — verify written work and accept reasonable drawings. | | Set 13 | Use the definition of congruence in terms of rigid motions to show th… — verify written work and accept reasonable drawings. | | Set 14 | Use the definition of congruence in terms of rigid motions to show th… — verify written work and accept reasonable drawings. | | Set 15 | Use the definition of congruence in terms of rigid motions to show th… — verify written work and accept reasonable drawings. | | Set 16 | Use the definition of congruence in terms of rigid motions to show th… — verify written work and accept reasonable drawings. | | Set 17 | Use the definition of congruence in terms of rigid motions to show th… — verify written work and accept reasonable drawings. | | Set 18 | Use the definition of congruence in terms of rigid motions to show th… — verify written work and accept reasonable drawings. | | Set 19 | Use the definition of congruence in terms of rigid motions to show th… — verify written work and accept reasonable drawings. | | Set 20 | Use the definition of congruence in terms of rigid motions to show th… — verify written work and accept reasonable drawings. |

Review tiers 1–10

• Checklists are parent-judged.
• Written items: verify against practice set patterns.
• Standard text: Use the definition of congruence in terms of rigid motions to show that two triangles are congruent if and only if corresponding pairs of sides and corresponding pairs of angles are congruent.

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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