The following shape is based only on squares, semicircles, and quarter circles. Find the perimeter of the shaded part.

vertical=18cm horizontal=18cm hypotenuse=25.5

step-by-step explanation:

320ft

step-by-step explanation:

120 divided by 3 equals 40

40 times 4=160

160 times 2=320

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.