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Mathematics, 14.11.2020 08:40 MatteBlack9868
CRYSTALLOGRAPHY Crystals are classified according to seven crystal systems. The basis of the classification
is the shapes of the faces of the crystal. Turquoise belongs to the triclinic system. Each of the six faces of turquoise
is in the shape of a parallelogram. Find the sum of the measures of the interior angles of one such face.
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