Pre-Calculus Homework Solutions 29

Pre-Calculus Homework Solutions 29 - 65 66 67 68 69 70 71...

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65. d 5 Ï ( x 2 2 w x 1 ) 2 1 w ( y 2 2 w y 1 ) 2 w LM 5 Ï (4 2 2 w ) 2 1 (5 w 2 1) 2 w 5 Ï 2 2 1 4 w 2 w 5 Ï 20 w 5 2 Ï 5 w MN 5 Ï (6 2 4 w ) 2 1 (4 w 2 5) 2 w 5 Ï 2 2 1 ( w 2 1) 2 w 5 Ï 5 w NP 5 Ï (7 2 6 w ) 2 1 ( 2 w 4 2 4) w 2 w 5 Ï 1 2 1 ( w 2 8) 2 w 5 Ï 65 w PQ 5 Ï (5 2 7 w ) 2 1 [ 2 w 8 2 ( 2 w 4)] 2 w 5 Ï ( 2 2) 2 w 1 ( 2 4 w ) 2 w 5 Ï 20 w 5 2 Ï 5 w QR 5 Ï (3 2 5 w ) 2 1 [ 2 w 7 2 ( 2 w 8)] 2 w 5 Ï ( 2 2) 2 w 1 1 2 w 5 Ï 5 w LR 5 Ï (3 2 2 w ) 2 1 ( 2 w 7 2 1) w 2 w 5 Ï 1 2 1 ( w 2 8) 2 w 5 Ï 65 w Perimeter 5 LM 1 MN 1 NP 1 PQ 1 QR 1 LR 5 2 Ï 5 w 1 Ï 5 w 1 Ï 65 w 1 2 Ï 5 w 1 Ï 5 w 1 Ï 65 w 5 6 Ï 5 w 1 2 Ï 65 w < 29.5 66. 145°; 90 , 145 , 180 so / ABC is obtuse. 67. 55°; 55 , 90 so / DBC is acute. 68. 90°; right 69. The front and back could be as much as 35.5 feet each and the sides could be as much as 75.5 feet each. P 5 2 , 1 2 w 5 2(35.5) 1 2(75.5) 5 71 1 151 5 222 Michelle should buy 222 feet of fencing. 70.
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