42.m/R1m/S1m/A5¬1804111091m/A5¬1801501m/A5¬180m/A5¬3043.y2y15¬m(x2x1)y235¬2(x24)44.y2y15¬m(x2x1)y2(22)5¬23(x22)y125¬23(x22)45.y2y15¬m(x2x1)y2(29)5¬11[x2(24)]y195¬11(x14)46.true; 19210¬,?119¬,1147.false; 31217¬,?1214¬,1248.true; 38176¬.?109114¬.109The Triangle InequalityPages 263–264Check for Understanding1.Sample answer: If the lines are not horizontal,then the segment connecting their y-intercepts isnot perpendicular to either line. Since distance ismeasured along a perpendicular segment, thissegment cannot be used.2.Jameson; 5110.13 but 518³13.3.Sample answer: 2, 3, 4 and 1, 2, 34.Check each inequality.514¬.?3413¬.?5513¬.?49¬.3 ✓7¬.5 ✓8¬.4 ✓All of the inequalities are true, so 5, 4, and 3 canbe the lengths of the sides of a triangle.5.5110¬.?1515¬³15Because the sum of two measures equals thethird measure, the sides cannot form a triangle.
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This note was uploaded on 12/19/2011 for the course MAC 1140 taught by Professor Dr.zhan during the Fall '10 term at UNF.