Question

даю 100 балів !!!!!!!!!!

Answer 1

Объяснение:

AD = CB

AD = AC + CD

CB = CD + BD

AC + CD = CD + BD

AC = BD

Answer 2

Ответ:

AD=AC+CD;

AD=AC+CD;CB=CD+BD;

AD=AC+CD;CB=CD+BD;AC+CD=CD+BD;

AD=AC+CD;CB=CD+BD;AC+CD=CD+BD;Отже AC=BD