68.You could use the slope formula to find that BCB C. Thus,ABCA B Cand ACBA C Bbecause of correspondingangles.AAbecause of the Third AngleTheorem.69.The sides are proportional and the angles arecongruent, so the triangles are similar.Page 297Maintain Your Skills70.7b.8¬233b¬7.8(2)3b¬15.6b¬5.271.cc23¬54(c2)(4)¬(c3)(5)4c8¬5c15c8¬15c¬23c¬2372.4y25¬y42y¬(4y5)(4)2y¬16y2018y¬20y¬19073.BCBA,BOBO, and mOBCmOBA. Bythe SAS Inequality,OCAO.74.ABCis isosceles with base angles 12[180(6840)]36. Then mAOB180(4036)104 and mAOD18010476 so,mAODmAOB.75.mABDmADBbecause if one side of atriangle is longer than another side, then theangle opposite the longer side has a greatermeasure than the angle opposite the shorter side.76.x5235180x9377.x3257180x9178.x4025180x11579.m1¬m210x9¬9x3x9¬3x¬12m110(12)91209 or 111m29(12)31083 or 11180.m1m4 (alternate interior )118)81.m2m4180 (supplementary consecutiveinterior )m2118180m26282.m
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