In a plane, if line f is perpendicular to line m and then f⊥n. a n║f b f║n c m⊥n d m║n

if f⊥m and m⊥n then  f⊥n, option C is correct.

Step-by-step explanation:

Given that in a plane if line f is perpendicular to line m

we have to choose the condition which results  f⊥n.

f⊥m and required result we want is f⊥n

By transitivity property

if a relates with b and b relates with c then a also related with c

Here, relation of a and b given i.e f⊥m and relation of a and c given i.e f⊥n

we have to find a relation between m and n so that  f⊥n holds

By transitivity law,

if f⊥m and m⊥n then  f⊥n

Hence, option C is correct.

the answer is 14ft

step-by-step explanation:

b

step-by-step explanation:

ez