The area of triangle is : 40.0
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Area = 0.5*Base*Height = 36 sq ft
If the shape is a triangle, then the area is approx 36.7 square mm.
The dimensions of a 10ft by 8ft area refer to its length and width. The 10ft measurement represents the length of the area, while the 8ft measurement represents the width. In this case, the area is rectangular, with a length of 10 feet and a width of 8 feet.
Using the cosine formula the angle between lengths 8 and 12 is 55.77113367 degrees. Using the sine formula the area of the triangle is 39.68626966 or about 40 square units.
(8x10) ÷ 2 = 40cm² (if units are cm)