Question

ek chaturbhuj ke teen bahya kono ka maan 120degree,70degree aur 80 degree hain to chauthe antha kon ka naam bataiye?

Answer 1

chauthe antha kon ka maan 90 degree h
total kon=180
total kon=antha kon+bahya kon
so,
180=antha kon(1)+120
antha kon(1)=180-120
antha kon(1)=60
isi trt se antha kon(2)=110
antha kon(3)=100
chaturbhuj k 4 kon=360
360=1+2+3+antha kon(4)
360=60+110+100+antha kon(4)
antha kon(4)=360-270
antha kon(4)=90