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.
The California Gold Rush. In the cold morning hours of January 24, 1848, James Marshall, a construction foreman at Sutter s Mill, was inspecting the water flow through the mill s tail race.he California Gold Rush is generally considered to have ended in 1858, when the New Mexican Gold Rush began. These hearty pioneers found the land unbelievably productive, and ultimately California's great wealth came not from its mines but from its farms. Kathy Weiser/Legends of America, updated June, 2015.