Infrastructure is underdeveloped is the answer
You can find the measure of any of the three sides, by knowing the measure of one side in the triangle. The hypotenuse is equal to twice the length of the shorter leg, which is the side across from the 30 degree angle.
The planet turns on it's axis (causes daytime and nighttime), and while that happens, the Earth circles the Sun and this causes our year.
Answer:
Tectonic plates are very thick and earthquakes are mostly unavoidable
