To find the area of a shaded region in a rectangle, find the total area of the rectangle and the area of the white region. Then subtract the white area from the rectangle's area.
Know MoreTo find the area of a rectangle, multiply the length and width of the rectangle together.
Calculate the area of the white space within the rectangle. If it also a rectangle, multiply its length and width together.
Subtract the area of the white space from the area of the entire rectangle. The result is the area of the shaded region within the rectangle.
Calculate the area of a trapezoid by identifying the length of the two parallel bases and the height of the polygon. Then, use the formula A = a + b/2 (h), where "a" and "b" are the two parallel base lengths and "h" refers to the height of the polygon.
Full Answer >The formula for the area of any triangle equals 1/2 the base times the height. For a right triangle, this is easy to remember ,since a right triangle is half of a rectangle on one side of its diagonal, and the area of a rectangle equals base times height.
Full Answer >Find the area of a triangle using the formula (b x h)/2. You need the value of "b," or base, and "h," or height.
Full Answer >Find the area of a circle using the equation A=?r^2. The area is equal to the radius, which is the distance from the center of the circle to its edge, times itself, times pi (approximately 3.1415).
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