Good thing he lined his hand up to the ship before he measured now isn't it?
assertion. cannot be assumed. are you reading anything i'm saying? you measured the ship: that's one triangle (actually, a quadrilateral). he measured the distance from his eye to his hand. that's another. you need to justify the perfectly straight line rather than assuming.
Nope, not assertion, just how you measure something. You line one end of your measuring device with one end of the item you are measuring. Since he is comparing the ship with a part of his body that is 10cm wide, and the ship is the same width of his hand, he has moved his hand closer or further away from himself to match the other hand of his hand to the other hand of his ship. This is not an assumption, it is how you measure.
Now, do you have anything more than your assertion that this is not how the OP took the measurement?
you are the one asserting. i am not saying he didn't, only that it is not necessarily so. his eye need not observe his hand at the same angle with which the hand interacts with the ship. you are giving one way to measure, you are not giving the only way.
So tell us, Oh Wise Jrowe, how is this not explained by the OP. If he has not had any issue with the way we are describing how we think he measured the ship, why you think what we are saying is wrong?
looking at the thread (reading, something you seem to struggle with) he's had plenty of issues with your answers.
Why don't you read the thread? (something that you sure accuse others of not doing when you are the one not understanding things) He has had issues with the math behind the answers, and not how the measurement was taken.
exactly. pay attention. my issue is with your math:
No, your issue isn't with the math (well, it might be also but one thing at a time), your issue has been with the taking of the measurement.
the assumptions you make about the observations.
See? You contradicted yourself here. You first said your issue was about the math, then you say it is about our assumptions, which there were none, about the setup of the measurement. That is not math there.
it would be the same as if you'd assumed a 45 degree angle. you just can't do that.
What are you going on about? When you measure something, you line your measuring device up with what you are measuring. If you are having trouble with understanding the simple concept of measuring something, how could you possibly think you have figured more complex ideas out?
your math relies upon an assumption you cannot hold. i have no problem with the person taking the observations: your math ommitted an unknown. there should be the smaller triangle with the hand at the far side, and then there should be a quadrilateral appended to it: you assumed falsely that the hypotenuse of the first triangle must lead smoothly into the side of the second. this is not necessarily the case. making a false assumption is a problem with your math.
try to pay attention rather than obsessing over semantics.
If you take your hand, line up one side to the end of an object, you have made a line. If you say your had is 10cm, and the other object is the same apparent length as your hand, you have lined the other side of your hand to the other side of the object. You have 5 points now.
Eye
Left side of hand
Left side of object
Right side of hand
Right side of object
The eye, left side of hand and left side of object line up
The eye, right side of hand and right side of object line up
You have two straight lines that converge on a single point, your eye.
You have made two triangles whose sides perfectly line up. There is no other way about it. The OP specifically mentions how he measured the ship. You are the one not understanding what is going on.