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.
- James Marshall, 1848. At a time when restless Americans were already itching to go west, the discovery of gold in California in 1848 was like gasoline on a fire. Within a year of its discovery, emigrants using the California Trail were flooding into the Sierra Nevada Range by the thousands. John Sutter was a Swiss immigrant who came to California in 1839 with a dream of building an agricultural empire.