The red supergiant Betelgeuse has a diameter of 1,680,000,000 km. If Betelgeuse is located 197 parsecs (pc) away, what is its apparent size (in arcseconds)?-- Note: The attached image shows multiple e

The red supergiant Betelgeuse has a diameter of 1,680,000,000 km. If Betelgeuse is located 197 parsecs (pc) away, what is its apparent size (in arcseconds)?

-- Note: The attached image shows multiple equations. Only the Chapter One equations can be chosen from! Also, please please please explain how you got the answer!!! --