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 A RECTANGLE The above shape is a shape of a rectangle. It is named as rectangle ABCD A rectangle is a four – sided flat shape. Every angle of a rectangle is a right angle (90°). The following are the characteristics of the rectangle: All interial angles are right angles (90°). Refer to the shape above. Opposite sides are parallel ( from the shape above AB // CD and AC // BD) Opposite  sides are equal  ( from the shape above AB = CD and AC = BD)   Perimeter of a rectangle Finding the perimeter of a rectangle when the length and the width are given and finding the length or the width when the perimeter is given are the goals of this lesson Given a rectangle with side length (L) and width (W), the perimeter (P) or distance around the outside of the rectangle can be found by doing P = L + W + L + W = (2 × L) + (2 × W ) = (L + W) x 2 Example #1: Find the perimeter of a rectangle when  L = 4 cm and W = 8 cm solution P = (2 × 4) + (2 × 8)  = (4 + 8) X 2 P = 12 x 2 P = 24 cm Notice that it is perfectly ok to do P = 8 + 4 + 8 + 4 = 12 + 12 = 24 However, it is usually easier and quicker to multiply each dimension by 2 and adding the results. Example #2: Find the perimeter of a rectangle when  L = 9 cm and W = 11 cm. solution P = (L + W) x 2. P = (9 + 11) x 2 P = 20 x 2 P = 40 cm Example #3: Find the perimeter of a rectangle with dimensions 2.4m by 1.3 m solution P = (L + W) x 2. P = (2.4 + 1.3) x 2 P = 3.7 x 2 P = 7.4  cm   ************************************* .u-star-rating-16 { list-style:none;margin:0px;padding:0px;width:80px;height:16px;position:relative;background: url('/.s/t/1706/rating.png') top left repeat-x } .u-star-rating-16 li{ padding:0px;margin:0px;float:left } .u-star-rating-16 li a { display:block;width:16px;height: 16px;line-height:16px;text-decoration:none;text-indent:-9000px;z-index:20;position:absolute;padding: 0px;overflow:hidden } .u-star-rating-16 li a:hover { background: url('/.s/t/1706/rating.png') left center;z-index:2;left:0px;border:none } .u-star-rating-16 a.u-one-star { left:0px } .u-star-rating-16 a.u-one-star:hover { width:16px } .u-star-rating-16 a.u-two-stars { left:16px } .u-star-rating-16 a.u-two-stars:hover { width:32px } .u-star-rating-16 a.u-three-stars { left:32px } .u-star-rating-16 a.u-three-stars:hover { width:48px } .u-star-rating-16 a.u-four-stars { left:48px } .u-star-rating-16 a.u-four-stars:hover { width:64px } .u-star-rating-16 a.u-five-stars { left:64px } .u-star-rating-16 a.u-five-stars:hover { width:80px } .u-star-rating-16 li.u-current-rating { top:0 !important; left:0 !important;margin:0 !important;padding:0 !important;outline:none;background: url('/.s/t/1706/rating.png') left bottom;position: absolute;height:16px !important;line-height:16px !important;display:block;text-indent:-9000px;z-index:1 } Category: Upper Primary | Added by: Admin (07/Aug/2016) | Author: Yahya Mohamed E W Views: 454 | Tags: WIDTH, voulume, Parallel, area, shapes, capacity, rectangle, Length, mathematics | Rating: 0.0/0