Need help with special right triangles

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

Determine which postulate or theorem can be used to prove that lmn =nmo

Meghan has created a diagram of her city with her house, school, store, and gym identified. a. how far is it from the gym to the store? b. meghan also wants to walk to get some exercise, rather than going to the gym. she decides to walk along arc ab. how far will she walk? round to 3 decimal places.