Preparing for the Regents Examination Geometry, AK

19 Score Explanation
6 The following proof or another appropriate proof is given.
Statements Reasons
1. Isosceles ABC, with −−
AB −−
BC 1. Given.
2. −−
BD bisects ABC. 2. Given.
3. ABD CBD 3. Definition of angle bisector.
4. −−
BD −−
BD 4. Reflexive property of congruence.
5. ABD CBD 5. SAS SAS.
6. −−−
AD −−−
CD 6. CPCTC.
7. −−
BD bisects −−
AC . 7. Definition of bisector.
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 −−
BD bisects −−
AC 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
1 a C
1 b D
2 c B
2 d C
0 A zero response is completely incorrect, irrelevant, or incoherent or is a correct
response that was obtained by an obviously incorrect procedure.
Chapters 1–7
(pages 454–456)
Part I
Allow a total of 20 credits, 2 credits for each of the following correct answers. Allow credit if the student has
written the correct answer instead of the numeral 1, 2, 3, or 4.
1 (3) supplementary 6 (4) −−
AB −−−
RM
2 (4) (0, 6) 7 (2) 3(b a)
3 (1) 6 8 (1) B is the largest angle.
4 (3) I and III only 9 (1) 15
5 (2) 2 10 (1) x _
2
Chapters 1–7 109