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Geometry B Unit 4B Practice Test Answers As you go through these answers, do your best to grade yourself so you know where you stand. Then, spend time reviewing and studying the problems you got wrong so you can do them better on the actual test. A good idea is to re-work homework problems, and keep looking back at your notes and homework. 1. 80° 2. a. x = 119; b. x = 10; c. t = 3, t = –7 3. 34 51 4. a. they are proportional; b. they are congruent 5. 21 inches A F 6. Similarity ratio is 4:3; B E ; AB BC AC FE ED FD C D 7. The figures on the left ARE similar, because all three angle pairs are congruent as well as all four side length pairs have the same ratio of 4:3; the figures on the right are NOT similar, the sides do not have the same ratio 8. a. PRQ UST , because all three side pairs have the same ratio, so the triangles are similar by SSS~; b. ABC PQ QR PR 0.6 , UT TS US EDC , the two 100° angles are congruent, and ACB ECD because they are vertical angles, so the triangles are congruent by AA~; c. JKL JNM , because JLK JMN and triangles are similar by SAS~. 9. B 10. C 11. NO – when you add 7 + 12, the sum is not greater than 19 12. 29 inches, 7 inches (careful here to put the larger number first!) 13. a. AA~; b. DE = 9.75, GF = 9 14. BH = 5.4, CD = 21.3 15. y = 19 16. a. CE; b. FB; c. CG; d. EG; e. AE; f. BD 17. 0.24 miles KL JL 4 , so the NM JM 3 18. 2.1 19. y = 11 20. 21.3 feet 21. Length: 3.5 inches; Width: 2.75 inches 22. a. 3:1; b. 3:1; c. 81 m; d. 9:1; e. 288m2