NCERT Solutions Class 9 Mathematics Chapter 6 Lines and Angles Variables
Exercise 6.1 Q.1) In Fig. 6.13, lines AB and CD intersect at O. If β π΄ππΆ + β π΅ππΈ = 70Β° and β π΅ππ· = 40Β°, find β π΅ππΈ and reflex β πΆππΈ. Sol.1) Given, β π΄ππΆ + β π΅ππΈ = 70Β° and β π΅ππ· = 40Β° A/q, β π΄ππΆ + β π΅ππΈ + β πΆππΈ = 180Β° (Forms a straight line) β 70Β° + β πΆππΈ = 180Β° β β πΆππΈ = 110β¦