Question

solve no. 6 and 5 fig is not given

Answer 1

In the 5th question
in triangle ABC and PQR
AB=PQ (Given)
BC=QR (Given)
AC=PR (AB=PQ=PR=AC)
By SSS congruency rule
Triangle ABC≈PQR
In 6th question
In triangle ADB and ADC
AD=AD (Common)
AB=AC (ABC is isosceles)
DB=DC (DBC is Isosceles)
By SSS congruency rule
ADB≈ADC
By CPCT
/_BAD=/_CAD
and /_ADB=/_ADC

If /_BDC=100°
/_ADC+/_ADB=360-/_BDC
/_ADB+/_ADB=360-100 (/_ADB=/_ADC)
2/_ADB=260°
/_ADB=130°