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Calculation formula of trapezoidal area
The formula for calculating the area of trapezoid is: S=(a+c)×h÷2.

The area formula of trapezoid is expressed by letters: S=(a+c)×h÷2. The area formula of trapezoid is expressed by letters: S = L H. The area formula of trapezoid: the area of trapezoid with diagonal lines perpendicular to each other is: diagonal x diagonal line ÷2.

Use "S" to indicate the area of the trapezoid, "A" to indicate the upper bottom of the trapezoid, "C" to indicate the lower bottom of the trapezoid, "L" to indicate the side length of the trapezoid, and "H" to indicate the height of the trapezoid.

1, the area formula of trapezoid = (upper bottom+lower bottom) × height ÷2, and the area formula is expressed in letters: S=(a+c)×h÷2.

2. The area formula of trapezoid = midline× height, expressed in letters: s = l× h.

3. The area of trapezoid with mutually perpendicular diagonals is: S= diagonal x diagonal÷2.

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