Question

Please solve the following question from NCERT class seventh Mathematics
Chapter 7

Answer 1

Have you proved that BAC congruent to DAC.
If you have then by using congruent parts of corresponding angles statement you can write that AB = AD.

Answer 2

hey there ,,, !!

i). angle DAC = angle bac ( cause az bisects the angle dab )

and . similarly angle dca = angle bca

and , we know that when two angles are equal than third angle will equal .

so. angle ADC = angle ABC

iii) yes ab = ad .

because ∆adc congruent to ∆abc ( by ASA criterion ) .

so the remaining side ab = ad ( by cpct ) .

hope that helps !!!

☺☺ himanshu Jha ☺☺