Be one of the first to ride the Atlanta Streetcar. The route runs in an East-West loop from the Historic Auburn Avenue to Centennial Olympic Park traveling on multiple streets with mixed traffic. The fare will be free for through the end of 2015.
 SSS  is when we know three sides of the triangle, and want to find the missing angles. To solve an SSS triangle: 1  use The Law of Cosines first to calculate one of the angles. 2  then use The Law of Cosines again to find another angle. 3  and finally use angles of a triangle add to 180Â° to find the last angle.
Set the measure of the exterior angle equal to the sum of the measures of the two non-adjacent interior angles. y + y + 40 = 180 2y + 40 = 180 2y = 140 y = 70. x = 70 + 40 x = 110. So, an exterior angle at the base measures 110Â°.hen, using the first theorem above, set the exterior angle (x) equal to the sum of the two non-adjacent interior angles which are 45Â° and 72Â°. x = 45 + 72 x = 117. So, an exterior angle at P measures 117Â°.