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What is the formula of polygon area?
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The area formula of polygon is:
1, rectangular area = length × width
Letter: S=ab
Length of rectangle = area ÷ width a=S÷b
Width of rectangle = area ÷ length b=S÷a
2. Square area = side length × side length
The letter means: S= a?
3. Area of parallelogram = base × height
Letter: S=ah
Height of parallelogram = area/base H = S ÷ A.
Base of parallelogram = area ÷ height a=S÷h
4. Area of triangle = base × height ÷2
Letter: S=ah÷2
Height of triangle = 2× area ÷ base H = 2s ÷ a.
The base of triangle = 2× area ÷ height A = 2s ÷ h.
5. Trapezoidal area = (upper bottom+lower bottom) × height ÷2
Letter: s = (a+b) h÷ 2.
Trapezoidal height = 2× area ÷ (upper bottom surface+lower bottom surface) h=2S÷(a+b)
Upper bottom surface of trapezoid = 2× area ÷ height-lower bottom surface a=2S÷h-b
Trapezoidal bottom = 2× area ÷ height-upper bottom b = 2s ÷ h-a.
1 km2 = 100 hectare
1 ha = 1 10,000 m2
1 m2 = 100 square decimeter
1 m2 = 10000 cm2
1 m =10 decimeter = 100 cm
Answered on March 6, 2022
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The area of the polygon in the first volume of the fifth grade.
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Polygon area formula
The formula for calculating the internal angle of a regular polygon has nothing to do with the radius. You should know that the number of sides of a regular polygon is n internal angles and = 180(N-2) the formula of inscribed triangle area of a circle with radius r: (3 times the root number 3) divided by 4 and then multiplied by the area formula of R-side circumscribed triangle: 3 times the root number 3 R-side circumscribed square: 4R-side inscribed square: 2R-side pentagon or above is divided into equilateral triangles, and then calculate the internal angles and formula. 180' We all know that the area formulas of A(x 1, y 1), B(x2, y2) and C(x3, y3) are |x 1 x2 x3| S(A, b, C) = | y1y2y3 | * 0.5 = [(x1-x3) * (y2-y3)-(x2-x3) * (y1-y3)] * negative clockwise for polygon a/kloc. Then: S(A 1, A2, A3,,, An) = ABS (S (P, A 1, A2 A 1)) P can take any point and use (0, 0) is as follows: the order of setting points (x1y1) (x2y2) ... (xnyn) is equal to | x1y1||||| x2y2 ||| xnyn | 0.5 * ABS (||+) Kloc-0/ | where | x1y1|| = x1* y2-y1* x2y2 | Therefore, the area formula is expanded to | X 1Y652 |. + | | + ......+| |)= 0.5 * ABS(x 1 * y2-y 1 * x2+x2 * y3-y2 * x3+...+xn * y 1-yn * x 1)| x2 y2 | | x3 y3 | | x 1y 1 |
Say you, you, you, he 5027
Answered on 2016/09/26.
28 likes 1 comments
What is the area formula of polygon?
1, regular polygon area. Area = 1/2 x perimeter x perimeter. The explanation of this formula is as follows: perimeter: the sum of all side lengths. Vertex: The vertical distance from the center of a polygon to each edge. If the topic requires you to use the apothem method, generally speaking, the size of apothem will be given in the topic. For example, if you want to calculate the area of a regular hexagon, the vertex of the regular hexagon is 10√3. If you already know the circumference, substitute it into the formula. 2. Calculate the area of a regular triangle. Use the following formula: area = 1/2 x bottom x height. For example, if the cardinal number is 10 and the height is 8, the area is 1/2 x 8 x 10, which is 40. 3. Calculate the square area. Just know the length of an edge and calculate its square. This is the same principle as the rectangular area formula (length x width). If the side length of a square is 6, then the area is 6 x 6, which is 36. 4. Calculate the area of the rectangle. Multiply the length by the width to get the area. If the length is 4 and the width is 3, then 4×3 = 12, and the area is obtained. 5, trapezoidal area formula. Area =/2, which can be simplified to (14 x 10)/2, that is, 140/2, and 70 is obtained.
Educator Xiao Yan
Answered on March 20, 2022
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