Developing Proofs

[lchanddragon]

In a plane , if a line is perpendicular to one of two parallel lines, then it is perpendicular to the other.

it's quite difficult w/ out the pic, but <'s 1 and 2 are right angles on lines r and s, and k is the transversal

given:k transversal(tr)r, r // s
prove:m // t

statements................................................reasons

1. k (tr) r ...........................................................1. given
2. <1 is a right angle........................................... a. _____
3. m<1 = 90 ...................................................... b. _____
4. r // s ............................................................ 4. given
5. m<2= m<1 .................................................... c. _____
6. m<2= 90.........................................................d. _____
7. <2 is a right angle........................................... e. _____
8. k (tr) s ........................................................... f. _____


i don't know how to do this. please help!!!


~ LcHaNdDrAgOn~<3 :?:

 

[pka]

In a plane , if a line is perpendicular to one of two parallel lines, then it is perpendicular to the other. it's quite difficult w/ out the picture.

That is total nonsense!
It depends totally upon the given axiom system!
WHAT are your given axioms?
In a plane you should know something about angles and parallel lines.
Then apply that!