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Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class


Transcript

Ex 6.1, 1 In the given figure, lines AB and CD intersect at O. If ∠AOC + ∠BOE = 70° and ∠BOD = 40° find ∠BOE and reflex ∠COE. Given ∠ BOD = 40° Since AB & CD intersect, ∠AOC = ∠BOD ∠AOC = 40° Also, ∠AOC + ∠BOE = 70° 40° + ∠BOE = 70° ∠BOE = 70° - 40° ∠BOE = 30° We need to find reflex ∠COE Reflex ∠COE = 360° – ∠COE First we finding ∠ COE Now, ∴ ∠AOC + ∠ COE + ∠BOE = 180° ∠COE + (∠AOC + ∠BOE) = 180° ∠COE + (40° + 30°) = 180° ∠COE + (70°) = 180° ∠COE = 180° – 70° ∠COE = 110° Reflex ∠COE = 360° - 110° = 250°

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.