Atriangle in quadrant i is reflected twice, first over the y-axis and then over the x-axis. the new triangle, in quadrant iii, could also have been obtained by using a single a) dilation. b) glide reflection. c) rotation. d) translation.

rotation

                    :)    :)    :)

large crystals result from very slow cooling.

evaporation of water: this would produce an evaporite which is a sedimentary rock. like a salt pan in a desert. not possible to have volcanic rocks originate this way.

crystalization in molten earth: slow cooling over time. (hundreds to millions of years)

crystalization at earth's surface: this results in fast cooling. (a few hours to a few months or years)

crystalization from cooling off hot water: that would be a hydrothermal deposit. while associated with volcanics they are not volcanic rocks themselves and usually occur fairly rapidly.