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.
He was wrong and, less than six years later, Mexico would cede California to the United States nine days after the largest gold strike in history. THE GOLD RUSH: James Marshall discovered gold at Sutter's Mill on the American River near Coloma, California, on January 24, 1848.He reported the find to his partner, John Sutter, on January 28, 1848. Even though Sutter and Marshall tried to keep the discovery a secret, word began to leak out within a few days.HE GOLD RUSH: James Marshall discovered gold at Sutter's Mill on the American River near Coloma, California, on January 24, 1848. He reported the find to his partner, John Sutter, on January 28, 1848.