139fa10ex3

# 139fa10ex3 - Math 13900 Exam 3 A Circle the LETTER of the...

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Math 13900 Exam 3 A Fall 2010 1 Circle the LETTER of the correct answer for #1-3. (7 pts)1. Use the information given about the angles of triangles I, II, and III to determine which, if any, of the triangles are similar. I) 70 and 45 50 II) 64 10 and 45 50 III) 70 and 64 50 . I and II only . II and III only . I and III only . I, II and III . No similarity exists A B C D E (7 pts)2. Using a broken ruler that is missing the first several inches, a student sets the ruler against a line segment such that the endpoints of the segment are at 5 3 and 9 8 16 4 respectively. What is the length of the line segment? 1 2 1 4 9 16 1 8 3 16 . 4 inches . 5 inches . 4 inches . 5 inches . 4 inches A B C D E (7 pts)3. One polyhedron has surface area 192 cm 2 and volume 128 cm 3 . Find the surface area and volume of the polyhedron’s image for a size change with scale factor 3 4 . 2 3 2 3 2 3 2 3 2 3 . SA:108 cm V: 32 cm . SA: 48 cm V: 32 cm . SA: 48 cm V: 54 cm . SA: 36 cm V: 32 cm . SA:108 cm V: 54 cm A B C D E

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Math 13900 Exam 3 A Fall 2010 2 (8 pts)4. Find and name the single rigid motion that would take A to
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