Preparing for the Regents Examination Geometry, AK

19 Score Explanation
6 The following proof or another appropriate proof is given.
Statements Reasons
1. B D 1. Given.
2. −−
BC −−−
DC 2. Given.
3. BCA DCE 3. Vertical angles are congruent.
4. ACB ECD 4. ASA ASA.
5 An appropriate proof with correct conclusion is shown, but one reason is faulty and/or
one statement is missing.
4 A faulty conclusion or no conclusion is drawn from the statements and reasoning.
3 An appropriate proof with correct conclusion is shown, but two reasons are faulty or
two steps are missing.
2 An appropriate proof with correct conclusion is used, but more than two reasons are
faulty or more than two steps are missing or have errors.
1 ACB ECD and a reason is given, but no appropriate method is shown.
0 A zero response is completely incorrect, irrelevant, or incoherent or is a correct response
that was obtained by an obviously incorrect procedure.
20 Score Explanation
6 The following proof or another appropriate proof is given.
Statements Reasons
1. −−
BD is the median to −−
AC . 1. Given.
2. D is the midpoint of −−
AC . 2. Definition of a median of an isosceles triangle.
3. −−−
AD −−−
DC 3. Definition of a midpoint.
4. −−
AB −−
BC 4. Given.
5. −−
BD −−
BD 5. Reflexive Property of Congruence.
6. I II 6. SSS SSS.
5 An appropriate proof with correct conclusion is shown, but one reason is faulty and/or
one statement is missing.
4 A faulty conclusion or no conclusion is drawn from the statements and reasoning.
3 An appropriate proof with correct conclusion is shown, but three reasons are faulty or
three steps are missing.
2 An appropriate proof with correct conclusion is used, but more than three reasons are
faulty or more than three steps are missing or have errors.
1 I II and a reason is given, but no appropriate method is shown.
0 A zero response is completely incorrect, irrelevant, or incoherent or is a correct response
that was obtained by an obviously incorrect procedure.
Chapters 1–4 101