NCERT Solutions Class 9 Mathematics Chapter 7 Triangles
Exercise 7.1 Q.1) In quadrilateral π΄πΆπ΅π·, π΄πΆ = π΄π· and AB bisects β A (see Fig.). Show that π₯π΄π΅πΆ β π₯π΄π΅π·. What can you say about BC and BD? Sol.1) Given, AC = AD and AB bisects β π΄ To prove, π₯π΄π΅πΆ β π₯π΄π΅π· Proof, In π₯π΄π΅πΆ and π₯π΄π΅π·, AB = AB (Common) AC = AD (Given) β πΆπ΄π΅β¦