Please explain.

What is the length of AA' ?

Question

Please explain.

What is the length of AA' ?

anonymous · Answer

attachment

anonymous · Answer

5/2 
might be wrong

anonymous · Answer

It gives me three spaces so I believe that's wrong. Can you explain it please? I want to actually learn how to do it.

ganeshie8 · Answer

draw a triangle with hypotenuse as AA' and apply pythagorean theorem

anonymous · Answer

Sorry I don't understand. Can you show me how to do it? What number do I pus as the hypotenuse?

anonymous · Answer

oh, I just did slope from A to A'

anonymous · Answer

I'll try squaring it and see if that's correct. :/ This is really confusing haha.

ganeshie8 · Answer

hey sry you still looking for help ?

ganeshie8 · Answer

@VengefulWave

anonymous · Answer

Yeah I'm still confused on the question.

ganeshie8 · Answer

attachment

ganeshie8 · Answer

Join AA' and create that triangle

ganeshie8 · Answer

Notice between AA',  
there are 5 horizontal grids and 2 vertical grids

anonymous · Answer

Sorry got logged out for some reason.

ganeshie8 · Answer

|dw:1417628008597:dw|

ganeshie8 · Answer

remember pythagorean theorem ?

anonymous · Answer

Yeah I remember Pythagorean theorem.

anonymous · Answer

But what grids are you talking about between AA'?

ganeshie8 · Answer

the blue grids in your graph

ganeshie8 · Answer

count them along horizontal side and then along vertical side

anonymous · Answer

@ganeshie8 Sorry I got confused with the grids. I didn't know they were called grids, but I knew how to graph them. 

When I do the problem I get 5.39 and I think the problem needs to be squared.

ganeshie8 · Answer

thats the right answer!