Whats the area, show work please

Organisms that live in the alpine and taiga biomes have developed unique adaptations that aid in their survival. the douglas-fir is a conifer tree that grows in the taiga biome. it has an average height of about 70 feet, and its wood is an important source of lumber.

Select the lengths in centimeters that would form a right triangle

This is about circle theorems. someone asap : (