Can the eclipse tell us the size of the moon?

I am an educator and my videos should never be used for technical reference. That may apply especially to this one. This video is designed for curious persons, of course. But it might have been created as an educational tool; a lesson plan. This requires two formulas from physics:
distance = rate x time
And
circumference = 2 π r
I think that, with guidance from the teacher, this little exercise is within reach of a 7th grade classroom.
And there is the astronomy side of it. This will add to understanding of the relationship between the sun , the moon and the earth.
supporting documentation lesson plans 7th grade through intro engineering
app.box.com/s/39jmodhq6qcekao...
The video is a good, even brilliant platform for education. Why do I emphasize that it should not be used for technical reference? Ask the kids!

[@mrphysh]

There are two very big assumptions. The first assumption is a little sketchy, but defensible. The second assumption is completely over looked. The theme of this video makes for a good platform for education.

[@mrphysh]

This is a school lesson plan. Start with this: What are the starting assumptions.? There is lots of depth. The lesson plan can go in lots of directions.

[@mrphysh]

I completely overlooked something. Anyone see it? Will this make an underestimation of the size or an over estimation of the size?

[@stevenreichertart]

That the moon takes 27.32 day to orbit, not 28. I know that nitpicking but wondered if that’s what you were thinking. Thanks for the video!

[@mrphysh]

@@stevenreichertart It is amazing that the value is so close. I must have missed two places and they canceled. (not 27.32 versus 28)