चित्र में, यदि ` m||n` तथा ` angle 1= 65^(@) ` हो तो ` angle 5` तथा ` angle 8` ज्ञात कीजिए |

Explanation

चूँकि
` " "angle 1= angle 3 " "` [शीर्षाभिमुख कोण]
` " "angle 3=angle 8" "` [संगत कोण ]
` therefore " "angle 1= angle 8`
` rArr " "angle 8=65^(@) " "[because angle 1=65^(@) ]` (दिया है)
चूँकि ` " "angle 5+ angle 8=180^(@) " "` [रैखिक युग्म ]
` therefore " "angle 5+ 65^(@) =180^(@) `
` rArr " "angle 5= 180^(@) -65^(@) =115^(@) `
अतः ` " "angle 5= 115^(@) ` तथा ` angle 8=65^(@)`
` (##RDS_HIN_MAT_IX_C08_SLV_026_S01.png" width="80%">