Please help, I don’t understand this and I did this from a while ago but I’m still confused on how to do it now.

Find the total area for the regular pyramid ( follow the answer set up in the picture)

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Identify the type of observational study described. a statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years. cross-sectional retrospective prospective