1Know the formula. The formula for the area of a kite is written as: Area = (1/2) * x * yThe formula can also be written as: Area = (x * y) / (2)In both formulas, x and y refer to the length of the two diagonals.Note that in standard geometry and most math problems, a "kite" refers to a diamond kite. The diagonals must intersect at right angles and the angles between unequal sides must be equal. It also has two pairs of equal sides.2Measure the diagonals. A diagonal is a straight line that runs from one vertex to the vertex on the opposite side. A traditional kite has a vertical diagonal running from top to bottom and a horizontal diagonal running from left to right.Example: Find the area of a kite with a vertical diagonal of 10 inches (25.4 cm) and a horizontal diagonal of 7 inches (17.8 cm).y = 10 inches (25.4 cm)x = 7 inches (17.8 cm)3Multiply the diagonals. Multiply the x and y values of the formula, or the lengths of the horizontal and vertical diagonals.Example: (x * y) = 7 * 10 = 704Divide the product by 2. The product of the horizontal and vertical diagonals must be divided by 2 or multiplied by 1/2. Either action will produce the same result.Example: (x * y) / 2 = 70 / 2 = 35Alternatively: (1/2) * x * y = (1/2) * 7 * 10 = 3.5 * 10 = 35
