Solve each problem involving triangles. See Examples 1–4. Diameter of the Sun...

Solve each problem involving triangles. See Examples 1–4.

Diameter of the Sun To determine the diameter of the sun, an astronomer might sight with a transit (a device used by surveyors for measuring angles) first to one edge of the sun and then to the other, estimating that the included angle equals . Assuming that the distance d from Earth to the sun is 92,919,800 mi, approximate the diameter of the sun.