![]() ![]() This approach can be employed to any irregular polygon, too. Opposite sides of a rectangle shape are the same length, with one pair being longer. Observe that the equality of the sum is necessary it is not sufficient that area$=0$),Įlse $P(x,y)$ is is inside the rectangle.Īcceptably this approach needs substantial amount of computation. A rectangle is a 2D shape that has 4 sides, 4 corners, and 4 right angles. If area of any of the triangles is $0$, then $P(x,y)$ is on the rectangle (in fact on that line corresponding to the triangle of area$=0$). If you want to know how to find the area of a rectangle, just follow these easy steps. To find the area of a rectangle, all you have to do is multiply its length with its width. A rectangle is a quadrilateral whose interior angles are all equal. If this sum is greater than the area of the rectangle, then $P(x,y)$ is outside the rectangle.Įlse if this sum is equal to the area of the rectangle (observe that this sum cannot be less than the latter), A rectangle is a quadrilateral 1 with two sides of equal length and two sides of equal width that contains four right angles. In other words, we can think of perimeter of a rectangular surface as. Width Given Area Width Given Perimeter Length Given Area Length Given Perimeter. ![]() we divide the rectangle into small squares of one centimetre side-length. Let $P(x,y)$, and rectangle $A(x_1,y_1),B(x_2,y_2),C(x_3,y_3),D(x_4,y_4)$Ĭalculate the sum of areas of $\triangle APD, \triangle DPC, \triangle CPB, \triangle PBA$. The perimeter of a rectangle is the linear distance around the boundary of the rectangle. Calculate width
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