Quatr.us > Math >Geometry > Quadrilaterals > Rhombuses. Rhombus. A rhombus is a kind of quadrilateral that has two sides that are parallel to each other, and another two sides that are parallel to each other. A rhombus is a special kind of parallelogram, and squares and rectangles are special kinds of rhombus. To figure out the perimeter of the rhombus, you can add the lengths of all the sides together. To figure out the area of a rhombus, you have to cut it into shapes that are easier to figure out. You want to cut it into a rectangle and two right triangles.
James Marshall's discovery of gold at Sutter's Mill in California in 1848, started the California Gold Rush.
California Gold Rush Articles. California Gold Rush summary: The California Gold Rush was the largest mass migration in American history since it brought about 300,000 people to California. It all started on January 24, 1848, when James W. Marshall found gold on his piece of land at Sutterâs Mill in Coloma. The news of gold quickly spread around.