Question

find a, b, c in the given figure ​

Answer 1

Let M&N be the two medians at the base QR from P

angle at P=10+50+60

P=120

therefore P+Q+R=180

120+30+R=180

R=30

then, c=30

∆PNR 60+30+b=180

b=90

∆PMR

angle at P now is 50+60=110

then 110+30+a=180

a=40