Rectangular billboard 20 meters wide and 8 meters wide

一、The most commonly used sizes of T-shaped advertising boards

The size of T-shaped advertising boards is generally 3 to 1, such as the conventional width is 6 meters, the length is 18 meters, and the total height is 18 meters , with a width of 7 meters, a length of 21 meters and a total height of 21 meters.

1. T-shaped is an outdoor billboard. Tall and eye-catching billboards should be installed on major roads including highways, urban roads, overpasses and other major sections.

2. Generally speaking, T-shapes include two-sided, three-sided and several four-sided T-shaped. The T-shaped front can be hung with pictures directly, or it can be flipped on three sides.

3. The size of T-shaped billboards is generally 3 to 1. For example, the conventional width is 6 meters, the length is 18 meters, the total height is 18 meters, and the width is 7 meters. , the length is 21 meters, the total height is 21 meters, the width is 8 meters, the length is 24 meters, and the height is 24 meters. The height of the pillars is also appropriately adjusted according to the height of the road surface to achieve the advertising effect.

4. T-shaped billboards are generally steel frame structures, made of steel pipes and angle iron. A rectangular or triangular plate is installed on a column, and the galvanized iron or color steel plate is sealed on the plate.

5. Create graphics or text on the surface of the card so that many people can see it and achieve the advertising effect.

As shown in the picture on the right, the rectangular billboard is 10 meters long and 8 meters wide. A, B, C, and D are on the four sides respectively. C is 5 meters lower than A, and D is on B

Divide the area of ​​this billboard into 8 equal triangles and a rectangle, because the areas of two triangles with equal bases and equal heights are equal.

Solution: The area of ​​the middle rectangle is 2*5=10 square meters

The area of ​​quadrilateral ABCD is 2*5=10 (square meters) larger than the sum of the areas of the four outer triangles ), so the area of ​​quadrilateral ABCD is (10*8+10)/2=45 (square meters).

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