What is the formula for converting perimeter to area? What is the Perimeter Area Formula?

Perimeter Area Formula:

1. Rectangle, square: circumference = (length + width) 2 (the circumference of the square can be reduced to the side length 4), area = length and width;

2. Triangle: perimeter = sum of the length of the three sides, area = base height 2;

3. Parallelogram: perimeter = sum of the length of the four sides, area = base height;

4. Trapezoid: perimeter = sum of the length of the four sides, area = (upper bottom + lower bottom) height 2;

5. Circle: Circumference Diameter, Area Radius of Circle, Radius.

If it is a square, the perimeter divided by 4 is the side length, and the area is the square of the side length. If it is circular, the radius is equal to the circumference divided by r and divided by 2, and the area is pi.

Multiply by the square l of the radius. If it is a rectangle, you only know the perimeter and cannot find the area. The integral of the length around the edge of a finite area is called the perimeter, which is the length of the circumference of the graph. The length of the perimeter of the polygon is also equal to the sum of all sides of the shape.

The circumference of the circle: c 2 r d (r is the radius, d is the diameter). The formula for calculating the area of a circle:

Circular area formula: s r2 or s d 2)2.  denotes pi (3 1415927.......)r for the radius and d for the diameter).

If it's a circle, knowing the perimeter can be converted to the area, the perimeter divided by 2 is the radius, and then the square is multiplied by is the area.

Divide by the circumference, is the diameter, the diameter divided by 2 is the radius, and the square of the radius is multiplied by the area of the circle.

CircumferenceArea formulais the circumference of the rectangle = (length and width) 2。The circumference of the square = side length 4, and the circumference of the (emphasized) circle = pi.

Diameter = 2 Pi radius, area of triangle = base height 2 s=ah 2, area of parallelogram = base height s=ah, area of trapezoidal = (upper base + lower bottom) height 2.

Formula summaryMathematical formulas. It is an expression method that people find some connections between things in nature and express them in a certain way. It is the equal or unequal connection between the number of different things in nature, it accurately reflects the relationship between the inside and outside of things, and is the basis for us to reach another thing from one thing, so that we can better understand the essence and connotation of things.

1. Formula for the perimeter and area of a rectangle and square.

Circumference of the rectangle = (length + width) 2 c = (a+b) 2 circumference of the square = side length 4 c = 4a

Area of the rectangle = length and width s=ab

Area of the square = side length side length s=a·a= a 2, triangle, parallelogram.

Area formula for trapezoid:

The area of the triangle = base height 2 s=ah 2

Area of the parallelogram = base height s=ah

The area of the trapezoid = (upper bottom + lower bottom) height 2

s=（a＋b）h÷2

3. Formula for the circumference and area of a circle:

The circumference of the circle is the diameter

Formula: l d 2 r

The area of the circle. Radius Radius

Formula: s r

4. Formula for the side area and surface area of the cylinder:

Side area of the cylinder:

The side area of the cylinder is equal to the circumference of the base surface multiplied by the height.

Formula: s=ch= dh2rh

Surface area of the cylinder:

The surface area of a cylinder is equal to the circumference of the base multiplied by the height plus the area of the circle at both ends.

Formula: s=ch+2s=ch+2 r

The formula for the perimeter and area of different shapes is different.

The calculation formula is as follows:1. The perimeter of the rectangle = (length + width) 2, c = (a + b) 2 2, the perimeter of the square = side length 4, c = 4a

3. The area of the rectangle = length and width, s = ab

Fourth, the area of the square = the length of the side of the side of the length , s = a 2<>

5. The area of the triangle = the height of the base 2, s=ah 2 6. The area of the parallelogram = the height of the base, s=ah

7. The area of the trapezoid = (upper bottom + lower bottom) height 2, s = (a b)h 2 8. Circumference of the circle = pi diameter = pi radius 2, c = d = 2 r 9. The area of the circle = pi radius radius r 2

Here's a formula for calculating the perimeter and area of a common graph:

Rectangle: Perimeter = 2 length + width).

Area = Length and Width.

Square: Perimeter = 4 side lengths.

Area = square of the length of the side.

Triangle: Circumferential Triangle Length = Side 1 + Side 2 + Side 3 Area = Base Height) 2

Circular: Circumference = 2 radius.

Area = radius of the square socks.

where is a constant of Wanghu, approximately equal to , representing the ratio of the circumference of a circle to its diameter.

The calculation formula is as follows:1. The perimeter of the rectangle = (length + width) 2, c = (a + b) 2 2, the perimeter of the square = side length 4, c = 4a

3. The area of the rectangle = length and width, s = ab

Fourth, the area of the square = the length of the side of the side of the length , s = a 2<>

5. The area of the triangle = the height of the base 2, s=ah 2 6. The area of the parallelogram = the height of the base, s=ah

7. The area of the trapezoid = (upper bottom + lower bottom) height 2, s = (a b)h 2 8. Circumference of the circle = pi diameter = pi radius 2, c = d = 2 r 9. The area of the circle = pi radius radius r 2

1. The circumference of the rectangle = (length + width) 2 c = (a + b) 22. The perimeter of the square = the side length 4 c = 4a

3. The area of the rectangle = length and width s=ab

4. The area of the square = the length of the side The length of the side = a

5. The area of the triangle = the base height 2 s=ah 26, the area of the parallelogram = the base height s=ah

7. The area of the trapezoid = (upper bottom + lower bottom) height 2 s = (a b) h 28, diameter = radius 2 d = 2r radius = diameter 2 r = d 29, circumference of the circle = pi diameter = pi radius 2 c = d = 2 r10, area of the circle = pi radius radius ?=r11, the surface of the cuboid does not start the product = (length and width + length height width height) 212, the volume of the cuboid = length width height v = abh13, the surface area of the cube = the edge length of the edge 6 s = 6a14, the volume of the cube = the edge length of the edge length v = a15, the side area of the cylinder = the perimeter of the bottom circle height s = ch16, the surface area of the Yuanling Chaxun column = the upper and lower bottom area + the side area.

s=2πr +2πrh=2π(d÷2) +2π(d÷2)h=2π(c÷2÷π)ch

17. The volume of the cylinder = the base area is high v=shv= r h= (d 2) h= (c 2 )h18, the volume of the cone = the bottom area is high 3

v=sh÷3=πr h÷3=π(d÷2) h÷3=π(c÷2÷π)h÷3

19. The volume of the cuboid (cube, cylinder) = base area high v=sh surface area s= *r 2+ rl (l is the length of the busbar) The side area of the cone is fan-shaped, and the radius of the fan is the busbar.