T. rex's serrated, cone-shaped teeth were most likely used to pierce and grip flesh. Its two-fingered forearms could probably seize prey, but they were too short to reach its mouth. Scientists believe this powerful predator could eat up to 500 pounds (230 kilograms) of meat in one bite.
Angles and distances are measured from the total station to points under survey, and the coordinates (X, Y, and Z or easting, northing and elevation) of surveyed points relative to the total station position are calculated using trigonometry and triangulation.
To find the measure of a regular polygon's external angle, you can either a) subtract the measure of one internal angle from 180; or b) divide 360 by the number of sides in the polygon (as explained above). This makes the internal and external angles supplementary or equal to 180 degrees when added together.