This NASA tracking antenna is a parabolic dish. Its receiver is placed at its focus 27 meters from the center of the dish (its vertex). For this
problem, assume the dish is pointing upward and represent the
vertex as (0,0). Write a parabolic equation that models the cross
section of the antenna dish.

The answer is: a = about 63.59ft2 for 15

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle

127 millimeters is the answer