Question

In the figure below, what is the sum, in terms of n, of the degree measures of the four angles marked with arrows?
(a) n
(b) 2n
(c) 180-n
(d) 360 -n
(e) 360 -2n

Answer 1

use triangle exterior angle theorem

Answer 2

http://regentsprep.org/Regents/math/geometry/GP5/LExtAng.htm

Answer 3

btw, \(n\) is the exterior angle for each of the triangles in the diagram

Answer 4

@lawls

This problem is explained on the Khan Academy site at http://tinyurl.com/my7bs4v
It is problem 15 and picks up at time 6:45 into the video.