Discover a world of knowledge at Westonci.ca, where experts and enthusiasts come together to answer your questions. Discover comprehensive answers to your questions from knowledgeable professionals on our user-friendly platform. Our platform provides a seamless experience for finding reliable answers from a network of experienced professionals.

given: quadrilateral ABCD with ∠A= ∠C and BD the bisector ∠ABC 
prove: DB bisects
 ∠ADC

Sagot :

ΔABD ≡ ΔCBD ( L.U.U) because (BD)≡(BD), ∠A≡ ∠C , <ABD≡<CBD => <ADB ≡ <CDB =>DB bisects ∠ADC;