0.5*8*10 = 40 sq ft
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16 feet
Its area is: 0.5*10*14 = 70 square feet
40 sq feet
It is: 0.5*8*10 = 40 square feet
The area of the rhombus is 40 square feet. To see why, Draw a rectangle encompassing the rhombus with sides parallel to the rhombus' diagonals. The rectangle has dimensions 10 ft X 8 ft = 80 square ft. Using the diagonals as dividers, each quarter of the rectangle is divided into 2 by one of the rhombus' sides. Thus the area of the rhombus is exactly half that of the encompassing rectangle.