RADIUS OF THE EARTH

85

skips

skips

15

questions

questions

Act One

Act Two

Act Three

- ImageDiagram
- Teacher note7.5 degrees is 1/48 of a full circle, so if 7.5 degrees represents an arc length of 844km, then 844km x 48 is the total circumfrence of the Earth = 40,512km.

Circumfrence is 2*pi*radius, so radius is circumfrence divided by 2pi = 6447.7km

This is reasonably close to the actual answer. - LinkEarth radius

Sequel

- 1.
How much water would fill a hollow Earth?

- 2.
How many Earth's would fit between the Earth and the Sun?

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