50 a = 120 b= 75 m<A = 95, m<B = 77, m<C = 85, m<D = 103 Ex: Find the missing variables. 5x+110=180 x= 14 a = 180-68 = 112 104=2y= 180 y=38 b = 224 104 = 120 – c = 142 104 = 38 – Ex: What is the m<A? 90º Ex: What is the measure of <2? 38º 43 x= 16 y = 14 Ex: M<SQP = ½(212) = 106º M<PQR = 74º
50 a = 120 b= 75 m<A = 95, m<B = 77, m<C = 85, m<D = 103 Ex: Find the missing variables. 5x+110=180 x= 14 a = 180-68 = 112 104=2y= 180 y=38 b = 224 – 104 = 120 c = 142 – 104 = 38 Ex: What is the m<A? 90º Ex: What is the measure of <2? 38º 43 x= 16 y = 14 Ex: M<SQP = ½(212) = 106º M<PQR = 74º
ch_12_teacher_notes.docx