REVIEW Geometry B Chapter 7 (8.1, 9.5)
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1 Class: Date: REVIEW Geometry B Chapter 7 (8.1, 9.5) Multiple Choice Identify the choice that best completes the statement or answers the question. 1. a..f b..g c..h d..i 2. Figure TQRS BCDE. Name a pair of corresponding sides? a. TQ and BE b. TS and CD c. RS and BC d. QR and CD Are the polygons similar? If they are, write a similarity statement and give the similarity ratio. 3. In QRS, QR = 4, RS = 15, and m R = 36. In UVT, VT = 8, TU = 32, and m T = 36. a. QRS VTU ; 15 c. SRQ UTV ; b. RSQ TUV ; 1 2 d. The triangles are not similar. 1
2 The polygons are similar, but not necessarily drawn to scale. Find the values of x and y. 4. The pentagons are regular. a. x = 27, y = 4 c. x = 28, y = 5 b. x = 27, y = 5 d. x = 28, y = 4 State whether the triangles are similar. If so, write a similarity statement and the postulate or theorem you used. 5. In QRS, QR = 16, RS = 64, and m R = 29. In UVT, VT = 8, TU = 32, and m T = 29. a. SRQ UTV ; ASA c. RSQ TUV ; ASA b. QRS VTU ; ASA d. The triangles are not similar. 6. a. ADB CDB; SAS c. ADB CDB; SSS b. ABD CDB; SAS d. The triangles are not similar. 7. Michele wanted to measure the height of her school s flagpole. She placed a mirror on the ground 48 feet from the flagpole, then walked backwards until she was able to see the top of the pole in the mirror. Her eyes were 5 feet above the ground and she was 12 feet from the mirror. Using similar triangles, find the height of the flagpole to the nearest tenth of a foot. a. 20 ft b ft c. 55 ft d. 25 ft 2
3 8. 5 and 6 a. 30 b. 6 c. 35 d. 30 Solve for a and b. 9. a. a = , b = b. a = , b = Find the values of x and y, given that OP Ä NQ. c. a = , b = d. a = 20 21, b = a. x = 10; y = 25.5 c. x = 13; y = 25.5 b. x = 20; y = 17 d. x = 25.5; y = 10 Solve for x. a b. 3 4 c. 17 d
4 12. a b c. 2 5 d. 91 Short Answer - Show your work. 13. Determine whether the figures are similar. 14. ABCD ~ WXYZ. AD = 6, DC = 3, and WZ = 47. Find YZ. The figures are not drawn to scale. Find the geometric mean of the pair of numbers and 9 4
5 16. Given: PQ Ä BC. Find the length of AQ. The diagram is not drawn to scale. 17. Solve for x Find the length of the missing side. The triangle is not drawn to scale. 5
6 Find the length of the missing side. Leave your answer in simplest radical form A triangle has sides of lengths 6, 2, and 7. Is it a right triangle? Explain The dashed triangle is a dilation image of the solid triangle. Find the center and scale factor of the dilation. 6
7 REVIEW Geometry B Chapter 7 (8.1, 9.5) Answer Section MULTIPLE CHOICE 1. ANS: B PTS: 1 DIF: L2 REF: 9-5 Dilations OBJ: Locating dilation images NAT: NAEP 2005 G2c ADP K.7 TOP: 9-5 Example 2 KEY: dilation enlargement scale factor word problem 2. ANS: D PTS: 1 DIF: L2 REF: 7-2 Similar Polygons TOP: 7-2 Example 1 KEY: similar polygons corresponding sides 3. ANS: D PTS: 1 DIF: L2 REF: 7-2 Similar Polygons TOP: 7-2 Example 2 KEY: similar polygons corresponding sides corresponding angles 4. ANS: A PTS: 1 DIF: L3 REF: 7-2 Similar Polygons TOP: 7-2 Example 3 KEY: corresponding sides proportion 5. ANS: D PTS: 1 DIF: L2 REF: 7-3 Proving Triangles Similar OBJ: The AA Postulate and the SAS and SSS Theorems NAT: NAEP 2005 G2e ADP I.1.2 ADP K.3 TOP: 7-3 Example 2 KEY: corresponding sides 6. ANS: A PTS: 1 DIF: L2 REF: 7-3 Proving Triangles Similar OBJ: The AA Postulate and the SAS and SSS Theorems NAT: NAEP 2005 G2e ADP I.1.2 ADP K.3 TOP: 7-3 Example 2 KEY: Side-Angle-Side Similarity Theorem corresponding sides 7. ANS: A PTS: 1 DIF: L2 REF: 7-3 Proving Triangles Similar OBJ: Applying AA, SAS, and SSS Similarity NAT: NAEP 2005 G2e ADP I.1.2 ADP K.3 TOP: 7-3 Example 4 KEY: Angle-Angle Similarity Postulate word problem 8. ANS: D PTS: 1 DIF: L3 REF: 7-4 Similarity in Right Triangles NAT: NAEP 2005 G2e ADP I.1.2 ADP K.3 TOP: 7-4 Example 1 KEY: geometric mean proportion 9. ANS: A PTS: 1 DIF: L3 REF: 7-4 Similarity in Right Triangles NAT: NAEP 2005 G2e ADP I.1.2 ADP K.3 TOP: 7-4 Example 2 KEY: corollaries of the geometric mean proportion 10. ANS: A PTS: 1 DIF: L3 REF: 7-5 Proportions in Triangles OBJ: Using the Side-Splitter Theorem NAT: NAEP 2005 G2e ADP I.1.2 ADP J.5.1 ADP K.3 TOP: 7-5 Example 1 KEY: Side-Splitter Theorem 1
8 11. ANS: A PTS: 1 DIF: L3 REF: 7-5 Proportions in Triangles OBJ: Using the Side-Splitter Theorem NAT: NAEP 2005 G2e ADP I.1.2 ADP J.5.1 ADP K.3 TOP: 7-5 Example 2 KEY: corollary of Side-Splitter Theorem 12. ANS: A PTS: 1 DIF: L2 REF: 7-4 Similarity in Right Triangles NAT: NAEP 2005 G2e ADP I.1.2 ADP J.5.1 ADP K.3 TOP: 7-4 Example 2 KEY: corollaries of the geometric mean proportion SHORT ANSWER 13. ANS: not enough information PTS: 1 DIF: L2 REF: 7-2 Similar Polygons TOP: 7-2 Example 2 KEY: similar polygons 14. ANS: 23.5 PTS: 1 DIF: L2 REF: 7-2 Similar Polygons TOP: 7-2 Example 3 KEY: corresponding sides proportion 15. ANS: 48 PTS: 1 DIF: L2 REF: 7-4 Similarity in Right Triangles NAT: NAEP 2005 G2e ADP I.1.2 ADP K.3 TOP: 7-4 Example 1 KEY: geometric mean proportion 16. ANS: 4 PTS: 1 DIF: L2 REF: 7-5 Proportions in Triangles OBJ: Using the Side-Splitter Theorem NAT: NAEP 2005 G2e ADP I.1.2 ADP J.5.1 ADP K.3 TOP: 7-5 Example 1 KEY: Side-Splitter Theorem 17. ANS: 33 PTS: 1 DIF: L2 REF: 7-4 Similarity in Right Triangles NAT: NAEP 2005 G2e ADP I.1.2 ADP J.5.1 ADP K.3 TOP: 7-4 Example 2 KEY: corollaries of the geometric mean proportion 2
9 18. ANS: 9.75 ft PTS: 1 DIF: L2 REF: 9-5 Dilations OBJ: Locating dilation images NAT: NAEP 2005 G2c ADP K.7 TOP: 9-5 Example 2 KEY: dilation enlargement scale factor word problem 19. ANS: 13 PTS: 1 DIF: L2 REF: 8-1 The Pythagorean Theorem and Its Converse OBJ: The Pythagorean Theorem NAT: NAEP 2005 G3d ADP I.4.1 ADP J.1.6 ADP K.1.2 ADP K.5 ADP K.10.3 TOP: 8-1 Example 1 KEY: Pythagorean Theorem leg hypotenuse 20. ANS: 2 34 cm PTS: 1 DIF: L2 REF: 8-1 The Pythagorean Theorem and Its Converse OBJ: The Pythagorean Theorem NAT: NAEP 2005 G3d ADP I.4.1 ADP J.1.6 ADP K.1.2 ADP K.5 ADP K.10.3 TOP: 8-1 Example 2 KEY: Pythagorean Theorem leg hypotenuse 21. ANS: no; PTS: 1 DIF: L2 REF: 8-1 The Pythagorean Theorem and Its Converse OBJ: The Converse of the Pythagorean Theorem NAT: NAEP 2005 G3d ADP I.4.1 ADP J.1.6 ADP K.1.2 ADP K.5 ADP K.10.3 TOP: 8-1 Example 4 KEY: Pythagorean Theorem 22. ANS: reduction; scale factor: 1 2 PTS: 1 DIF: L2 REF: 9-5 Dilations OBJ: Locating dilation images NAT: NAEP 2005 G2c ADP K.7 TOP: 9-5 Example 1 KEY: dilation reduction center of dilation scale factor 23. ANS: center: (0, 0); scale factor: 1 3 PTS: 1 DIF: L2 REF: 9-5 Dilations OBJ: Locating dilation images NAT: NAEP 2005 G2c ADP K.7 TOP: 9-5 Example 1 KEY: dilation reduction center of dilation scale factor 3
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