Because base times height = the area of a parallelogram and a triangle's area
is half that of the parallelogram that the triangle exactly fits into.
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The area of any triangle has the same formula, which is base times height, divided by 2. A scalene triangle is a triangle with three sides of unequal length, which is not important when calculating the area.
Area = (length) times (width)Length = (area) divided by (width)Width = (area) divided by (length)
Because a triangle is half of a rectangle. The area of a rectangle is length times width, the area of a triangle is half that.
the area of a triangle is base times height times one half and rectangle is length times width
base times height divided by 2