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Preparing for the Regents Examination Geometry, AK

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Part IV<br />

For each question, use <strong>the</strong> specific criteria to award a maximum of 6 credits.<br />

18 Score Explanation<br />

6 2. If two sides are congruent, <strong>the</strong> triangle is isosceles.<br />

3. Base angles of isosceles triangles are congruent.<br />

4. Exterior angle of a triangle is greater than ei<strong>the</strong>r nonadjacent interior angle.<br />

5. Substitution postulate.<br />

6. Longest side of a triangle is opposite <strong>the</strong> angle with <strong>the</strong> largest measure.<br />

5 One reason is faulty or missing.<br />

4 Two reasons are faulty or missing.<br />

3 Three reasons are faulty or missing.<br />

2 More than three reasons are faulty or missing.<br />

0 A zero response is completely incorrect, irrelevant, or incoherent or is a correct response<br />

that was obtained by an obviously incorrect procedure.<br />

Check students’ graphs. The coordinates are listed below.<br />

19 Score Explanation<br />

1 a A(6, 6), B(12, 6), C(6, 15)<br />

2 b A(6, 6), B(12, 6), C(6, 15)<br />

2 c A(6, 4), B(6, 10), C(15, 4)<br />

1 d D 3<br />

0 A zero response is completely incorrect, irrelevant, or incoherent or is a correct response<br />

that was obtained by an obviously incorrect procedure.<br />

20 Score Explanation<br />

1 a Student graphs points A and B correctly.<br />

3 b x 4 and an appropriate explanation is given. Student graphs point C correctly.<br />

2 c 0, and an appropriate explanation is given.<br />

1 Correct answers <strong>for</strong> b and c, but no explanation is given.<br />

0 A zero response is completely incorrect, irrelevant, or incoherent or is a correct response<br />

that was obtained by an obviously incorrect procedure.<br />

Chapters 1–8 115

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