Question

If R-S-T and l(RS)=12, l(ST)=5 find l(
RT)

Answer 1

if l (RS) = 12 : l(ST) =5 and R-S-T
l (RT) = l (RS) + l (ST) ...... ( R-S-T)
= 12 + 5
= 17
l (RT) = 17