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.
Gold Rush Facts: 1  Gold was discovered on January 24, 1848 by James Marshall at Sutter's Mill in Coloma. 2  The lure of sudden wealth brought about rapid, uncontrolled population growth and rapid, uncontrolled prices for necessary goods and services. 3  More fortunes were made by merchants than by miners.