How do i work out the circumferences for question one ?

EXERCISE 3: Ptolemy - Sizes and distances - G3 This is a graded discussion: 40 points possible due Sep 13 EXERCISE 3: Ptolemy - Sizes and distances - G3 1 1 From HSTM-1113-996 Ptolemy: Sizes and Distances (You can enter your answers either in a Word document and upload it or enter them here.) Question 1: The absolute distance to the moon, at the closest approach, is 33 earth radii (e.r.). The absolute distance to the sun, at the closest approach, is 1100 e.r. Using a calculator (there is probably one in your cell phone): (a) Use the formula for the circumference of a circle (c = 27, 7 ~ 3.14) to work out the circumferences, in earth radii, of the circles corresponding to the closest positions of the moon and the sun. (b) If the moon and sun both seem to be half a degree wide when viewed from the earth, how much larger, in earth radii, is the diameter of the sun than the diameter of the moon? Question 2: Using the materials provided, make a scale drawing of Ptolemy's cosmos, using the figures indicated below. Label the spherical shell -- or orb - corresponding to each object, in the correct order. From your drawing, determine which planet has the thickest orb. Planet Relative Distance Ptolemy Earth greatest least Jupiter greatest 14.4 G DII FZ F3 F5 F6 F7 FB F9 F10 - F11 F12 & W A 6 8 9 O delete E R U O P D G H C K retur B N M command option