form triangle DEC which statements about the two triangles must be true?
I think this would be the Great Wall of China!
although it's actually thought to be much, much longer: over 5000 miles long, if yoiu include natural defensive barriers used in it.
Answer:
A hot spot
Explanation:
In geology, a hot spot is an area of the Earth’s mantle from which hot plumes rise upward, forming volcanoes on the overlying crust.
I hope this helps!
