The University of the State of New York REGENTS HIGH ...29 Triangle MNP is the image of triangle JKL...

The University of the State of New York

REGENTS HIGH SCHOOL EXAMINATION

GEOMETRY (COMMON CORE)Wednesday, August 17, 2016 — 8:30 to 11:30 a.m.

MODEL RESPONSE SET

Table of Contents

Question 25 . . . . . . . . . . . . . . . . . . . 2

Question 26 . . . . . . . . . . . . . . . . . . . 6

Question 27 . . . . . . . . . . . . . . . . . . 13

Question 28 . . . . . . . . . . . . . . . . . . 18

Question 29 . . . . . . . . . . . . . . . . . . 22

Question 30 . . . . . . . . . . . . . . . . . . 28

Question 31 . . . . . . . . . . . . . . . . . . 32

Question 32 . . . . . . . . . . . . . . . . . . 36

Question 33 . . . . . . . . . . . . . . . . . . 44

Question 34 . . . . . . . . . . . . . . . . . . 52

Question 35 . . . . . . . . . . . . . . . . . . 58

Question 36 . . . . . . . . . . . . . . . . . . 65

Question 25

25 Lines AE and BD are tangent to circles O and P at A, E, B, and D, as shown in the diagram below.If AC:CE � 5:3, and BD � 56, determine and state the length of CD

Score 2: The student had a complete and correct response.

Geometry (Common Core) – Aug. ’16 [2]

Question 25

Score 1: The student substituted incorrectly and found the length of ___CB.

Question 25

Score 0: The student did not show enough relevant correct work to receive any credit.

Question 26

26 In the diagram below, �ABC has coordinates A(1,1), B(4,1), and C(4,5). Graph and label�A�B�C�, the image of �ABC after the translation five units to the right and two units up followed by the reflection over the line y � 0.

Question 26

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Question 26

Score 1: The student made an error by graphing the reflection and then the translation.

Question 26

Score 1: The student made an error by translating five units to the left.

Question 26

Score 1: The student made an error by reflecting over the y-axis.

Question 26

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Score 1: The student performed the sequence of transformations algebraically.

Question 26

Score 0: The student graphed the sequence of transformations incorrectly.

Question 27

27 A regular hexagon is rotated in a counterclockwise direction about its center. Determine and statethe minimum number of degrees in the rotation such that the hexagon will coincide with itself.

Question 27

Score 1: The student found the measure of one interior angle of the hexagon.

Question 27

Score 0: The student had a completely incorrect response.

Question 28

28 In the diagram of �ABC shown below, use a compass and straightedge to construct the medianto AB

___. [Leave all construction marks.]

Question 28

Score 1: The student had a correct construction of a perpendicular bisector, but did not draw themedian.

Question 28

Score 0: The student made a drawing that was not a construction.

Question 29

29 Triangle MNP is the image of triangle JKL after a 120° counterclockwise rotation about point Q.If the measure of angle L is 47° and the measure of angle N is 57°, determine the measure ofangle M. Explain how you arrived at your answer.

Question 29

Score 1: The student wrote a correct explanation, but the angle measure was incorrect.

Question 29

Score 1: The student did not write an explanation.

Question 29

Score 1: The student had an incomplete explanation.

Question 29

Question 30

30 A circle has a center at (1,–2) and radius of 4. Does the point (3.4,1.2) lie on the circle? Justify your answer.

Question 30

Score 1: The student made a substitution error, but wrote an appropriate conclusion.

Question 30

Question 31

31 In the diagram below, a window of a house is 15 feet above the ground. A ladder is placed againstthe house with its base at an angle of 75° with the ground. Determine and state the length of theladder to the nearest tenth of a foot.

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Question 31

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Question 31

Score 1: The student had a correct equation, but solved it incorrectly.

��

Question 31

Score 0: The student did not show enough relevant correct work to receive any credit.

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Question 32

32 Using a compass and straightedge, construct and label �A�B�C�, the image of �ABC after a dilation with a scale factor of 2 and centered at B. [Leave all construction marks.]

Describe the relationship between the lengths of ___AC and

____A�C� .

Question 32

____A�C� .

Question 32

Score 3: The student had a correct construction, but the description was of a correct relationshipother than length.

____A�C� .

Question 32

Score 2: The student had a correct description, but no further correct work was shown.

____A�C� .

Question 32

Score 2: The student did not label A� and C� on the construction. The description was incomplete.

____A�C� .

Question 32

Score 1: The student made an incorrect construction. The description was incomplete.

____A�C� .

Question 32

Score 1: The student wrote an incomplete description and the construction was missing.

____A�C� .

Question 32

Score 0: The construction and description were completely incorrect.

____A�C� .

Question 33

33 The grid below shows �ABC and �DEF.

Let �A�B�C� be the image of �ABC after a rotation about point A. Determine and state thelocation of B� if the location of point C� is (8,–3). Explain your answer.

Is �DEF congruent to �A�B�C�? Explain your answer.

Question 33

Score 3: The student wrote an incomplete explanation for why �DEF is congruent to �A�B�C�.

Question 33

Score 3: The student wrote an incomplete explanation for why �DEF is congruent to �A�B�C�.

Question 33

Score 2: The student wrote two incomplete explanations.

Question 33

Score 1: The student wrote yes, but the explanation was incorrect. No further correct work wasshown.

Question 33

Score 1: The student showed work to find (7,1), and wrote yes, but did not write any explanations.

Question 33

34 As modeled below, a movie is projected onto a large outdoor screen. The bottom of the 60-foot-tall screen is 12 feet off the ground. The projector sits on the ground at a horizontal distance of 75 feet from the screen.

Determine and state, to the nearest tenth of a degree, the measure of �, the projection angle.

Question 34

Score 3: The student made a transcription error.

Question 34

Score 2: The student made a conceptual error in using an obtuse triangle for right triangletrigonometry.

601275�

Question 34

Score 1: The student determined only one angle of elevation.

Question 34

Score 0: The student did not show enough correct work to receive any credit.

Question 35

35 Given: Circle O, chords AB___

and CD___

intersect at E

Theorem: If two chords intersect in a circle, the product of the lengths of the segments of onechord is equal to the product of the lengths of the segments of the other chord.

Prove this theorem by proving .AE EB CE ED• •�

Question 35

Score 5: The student did not include drawing chords AC___

, CB___

, BD___

, and AD___

in the proof.

and CD___

intersect at E

Question 35

Score 4: The student omitted one statement and reason, and another reason was incomplete.

and CD___

intersect at E

Question 35

Score 3: The student had three missing or incomplete statements.

and CD___

intersect at E

Question 35

Score 2: The student gave two correct relevant statements and reasons.

and CD___

intersect at E

Question 35

Score 1: The student correctly stated the vertical angles were congruent.

and CD___

intersect at E

Question 35

and CD___

intersect at E

36 A snow cone consists of a paper cone completely filled with shaved ice and topped with a hemisphere of shaved ice, as shown in the diagram below. The inside diameter of both the coneand the hemisphere is 8.3 centimeters. The height of the cone is 10.2 centimeters.

The desired density of the shaved ice is 0.697 g/cm3, and the cost, per kilogram, of ice is $3.83.Determine and state the cost of the ice needed to make 50 snow cones.

8.3 cm

10.2 cm

Question 36

8.3 cm

10.2 cm

Question 36

Score 5: The student found the volume of a sphere and not a hemisphere.

8.3 cm

10.2 cm

Question 36

Score 5: The student used an incorrectly rounded total volume of one snow cone when computingthe mass.

8.3 cm

10.2 cm

Question 36

Score 4: The student determined the cost of the cone without the hemisphere.

8.3 cm

10.2 cm

Question 36

Score 3: The student found the volume of fifty snow cones, but no further correct work was shown.

8.3 cm

10.2 cm

Question 36

Score 2: The student made an error in determining the volume of the cone, but found an appropriate mass of fifty snow cones. No further correct work was shown.

8.3 cm

10.2 cm

Question 36

Score 1: The student determined the volume of the cone.

8.3 cm

10.2 cm

Question 36

Score 0: The student did not show enough work to receive any credit.

The University of the State of New York REGENTS HIGH ...29 Triangle MNP is the image of triangle JKL...

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