The diameter of the star Betelgeuse in the constellation of Orion is approximately 200 million miles. It's distance from earth is approximately $3 \times 10^{15}$ (3 quadrillion) miles (about 507 light years). It subtends the angle seconds of degree. A penny has a diameter of 0.75 inches. You figure that Betelgeuse subtends the same angle as a penny at a distance of miles.
Hint: One degree is 3600 seconds of degree. For the second part of the problem think in terms of similar triangles.