What is the energy flow of a existing Rock to Metamorphic Rock?

When existing rock is exposed to high temperatures and pressures, thermal energy is transferred to the rock by conduction. This causes the particles of the rock to be rearranged, resulting in the formation of metamorphic rock

point a is the center of the circle that passes through points e, f, and g and the center of the circle that passes through points x, y, and z.

you can't solve x because it is 2 linear equation and you only have one equation