Why does japan have so many volcanoes?

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This reason is that Japan is located along the Pacific 'ring of fire' which is an area along the Pacific plate boundaries where there is a lot of volcanic activity

Explanation:

Japan also lies on the edges of several continental and oceanic plates so this is why Japan experiences a lot of earthquakes.

4ft

Step-by-step explanation:

A) This is a Pythagorean Triple.

B) 3^2 +x^2=5^2

9+x^2=25

x^2=16

x=4