Which of the following southeast asian countries is landlocked?
a. malaysia
b. cambodia
c. philippines
d. laos
e. thailand

The sun's parallax would be 180 degrees, greater than which you can't get.  so a. would be your anwser 

Geothermic gradient is the rate of increasing temperature with respect to increasing the depth in the earths interior. away from tech tonic plates boundaries, it is about 25-40 c/km (72-87 degrees f/mi) of depth near the surface in most of the world.

It should be a because the dilation changes the sides but not angles because in all shapes you have a certain degree number to add up to like for example a triangle is always 180 degrees