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You can cut off the 4 ft triangle from the left and move it to the right to fill in a rectangle 20 ft wide by 15 ft high. You can always do this, so the area of any parallelogram is the product of base length and height, just as it is for a rectangle.

The area of the parallelogram is (20 ft)*(15 ft) = 300 ft^2.

Answer: d. 39 cmin the diagram, the approximate length of the minor arc de is 39 centimetres.step-by-step explanation: the formula for the length of an arc in a circle is as displayed below.let the length of the minor arc de = xx = 2( pi )r × angle of sector / 360°from this, we will substitute the values given from the problem into the formula to obtain the length of the minor arc de.x = 2( pi )r × angle of sector / 360°r = radius = 25cmpi as an approximate value = 3.14angle of sector = 120°x = 2( 3.14 )( 25 ) × 120° / 360°x = 157 × 1 / 4x = 39.25x = 39 ( rounded to the nearest whole number as an approximate value )