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Preparing for the Regents Examination Geometry, AK

Preparing for the Regents Examination Geometry, AK

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16 Score Explanation<br />

4 DN √ 106 , NA √ 106 , making DNA isosceles.<br />

Slope −−−<br />

9<br />

DN _ and slope<br />

5 −−−<br />

5<br />

NA _ . Since <strong>the</strong> slopes are negative reciprocals of each<br />

9<br />

o<strong>the</strong>r, −−−<br />

DN −−−<br />

NA . There<strong>for</strong>e, DNA is an isosceles right triangle.<br />

3 An appropriate method is used, but a single computational error is made.<br />

2 An appropriate method is used, but DNA is not proven to be an isosceles right<br />

triangle.<br />

1 An appropriate method is used, but multiple computational errors are made.<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 />

17 Score Explanation<br />

4 6 √ , and an appropriate explanation is given.<br />

3 An appropriate method is used, but a single computational error is made.<br />

2 An appropriate method is used, but multiple computational errors are made.<br />

1 6 √ , 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 />

124 Cumulative Reviews

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