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Square, circle, rectangle, trapezoid, triangle, parallelogram, cone, cylinder surface area and volume, area, perimeter is what calculation formula!
All?
Because of the final exam, I have forgotten some mathematical formulas. Please write the area perimeter of rectangle, square, circular cone, parallelogram, triangle, trapezoid Letters, too. Don't make mistakes
The number of copies per copy = the total number of copies △ the number of copies per copy = the total number of copies △ the number of copies = 2.1 times × multiple = several times several times △ 1 times = several times several times △ 1 times = Times several times × = 1 times 3 speed × time = distance △ time = speed 4 unit price × quantity = total price ×
As shown in the figure, the area of a square is 6 square centimeters, and the area of a circle is______ .
14 × 6 = 18.84 (square centimeter);
A: the area of the circle is 18.84 square centimeters
So the answer is: 18.84 square centimeter
There is a quarter circle in a 40 square centimeter square. Find the area of the circle (Grade 6)
This is easy to find, because the area of the square = side length × side length
The area of the circle is = 3.14 × radius × radius, then the area of the square here is radius × radius
Then 3.14 × 40 = 125.6 m2
1 / 4 = 125.6 × 1 / 4 = 31.4 m2
Xiao Ming uses a square piece of paper to cut the largest circle inside. After calculation, the area of the circle is 125.6 square centimeters. Can you help Xiao Ming calculate the square paper Xiao Ming uses a square piece of paper to cut out the largest circle inside. After calculation, the area of the circle is 125.6 square centimeters. Can you help Xiao Ming calculate the size of the original square paper? How large is the area of the remaining scraps? The side length of the square paper is 10
12.56 / 3.14 = 4 4 × 4 = 16 square = 16 square meters
16- (4/2) square × 3.14=12.56 square
Remaining: 16-12.56 = 3.44 square meters
A:————————————————
The area of the square in the figure below is 20 square centimeters. What is the area of the largest circle in the middle of the square? It's the picture of the biggest circle in the middle of a square?
The area of the square = the square of the side length = a? 2 = 20 square centimeters
Radius of maximum circle = A / 2
The area of the largest circle = 3.14 × (A / 2) 2 = 3.14 × a 2 / 4 = 3.14 × 20 △ 4 = 15.7 square centimeter
Given that the area of a square is 20 square centimeters, find the area of a circle The picture is a square with the largest circle (diameter equal to side length) in the square I'm sorry I didn't learn any root sign. Can you just use formula or formula or equation to solve it?
Let the radius of the circle be x cm, then the side length of the square (the diameter of the circle) is 2x cm
Area of square = 2x × 2x = 4x? 2 = 20 (square centimeter)
4X²=20
X²=5
The area of the circle = 3.14 × x 2 = 3.14 × 5 = 15.7 (square centimeter)
As shown in the figure below, the area of the circle is 6.28 square centimeters, and the area of the square inside the circle is the largest______ .
Let the radius of the circle be r, then π R2 = 6.28, R2 = 2,
One
2r2×4，
=2r2，
=2×2，
=4 (square centimeter);
A: the largest area of a square in a circle is 4 square centimeters
So the answer is: 4 square centimeter
Given that the area of a circle is 6.28 square centimeter, then the largest area of square inside the circle is () square centimeter 2. Build a road. When it reaches 3 / 8 of the road, it is still 30 meters away from the middle point. The total length of the road is () meters 3. If you add one of its fractional units to get 1, the score is () 4. The ratio of three consecutive even numbers is 21:22:23, and the largest even number is ()
It is known that the area of the circle is 6.28 square centimeter, then the maximum area of the square inside the circle is (4) square centimeter. Square area / circle area = [(2R) * (2R) / 2] / (3.14 * r * r) = 2 / 3.14 (R is the radius). Therefore, the square area = 2 / 3.14 * 6.28 = 42, repair a road, when it reaches 3 / 8 of the road
Draw the largest circle in a square with a circumference of 28 cm. The circumference of the circle is______ Centimeter
Side length of square: 28 △ 4 = 7 (CM),
14 × 7 = 21.98 (CM),
A: the circumference of the circle is 21.98 cm
So the answer is: 21.98
RELATED INFORMATIONS
- 1. A square and a circle have the same radius. The area of the circle is 28.26 square centimeters. What is the area of the square
- 2. Use six squares of the same size to make the following figure. The shadow area is 12 square centimeters. Can you figure out the area of the blank part?
- 3. The circle O of the equilateral triangle ABC with circumference of 6 π and radius of 1 starts from the position where AB is tangent to point D Then: on the outside of triangle ABC, roll clockwise along the triangle and return to the position of point d tangent to ab. how many cycles does circle O rotate? What do you mean by turning the outer angles of three triangles? Why can you turn one angle by turning an outer angle? Why not turn 240? You'd better take the picture to solve it! How to turn it?
- 4. In the equal ratio sequence an, TN is the product of the first n terms. If TN = 1, then A .a2=1 B.a3=1 C.a5=1 D.a9=1
- 5. The sum of the first n terms of the arithmetic sequence {an} is Sn, and a4-a2 = 8, A3 + A5 = 26 If there is a positive integer m such that TN ≤ m holds for all positive integers n, then the minimum value of M is______ .
- 6. If a5-a1 = 15, a4-a2 = 6, then A3 = () A. 4 B. -4 C. ±4 D. ±2
- 7. The sum of the first n terms of the sequence {an} is SN. It is known that S1, S3 and S2 are isometric sequences (I) find the common ratio Q of {an}; (II) A1-A3 = 3, find SN
- 8. A standard football has several regular pentagons and regular hexagons. What is the length of each side, the radius and the volume of each ball? How many pounds is the qualified saturation
- 9. It is known that the length of the three sides of a Pentagon is 3cm, 5cm and 2cm, and the four angles are respectively 90 degrees, 90 degrees, 90 degrees and 135 degrees
- 10. If a circle with radius 1 is drawn with the three vertices of the triangle as the center of the circle, the area of the shadow part is more. The shadow is three outer corners
- 11. The side length of the two squares in the figure is 10 cm and 6 cm respectively
- 12. It is known that the area of a circle is 6.28 square meters, and the radius of the circle is equal to the side length of the square
- 13. Two squares, one square area is 81 square meters, the other square side length is equal to half of the first square, calculate the area of the second square I can't ask my parents. I know the answer, but I don't know how to make it,
- 14. The radius of the inscribed circle of the square is R. find the radius of the circumscribed circle of the regular hexagon and its side length I've never learned a function to find the radius of the circumscribed circle and the length of its side. ... without functions
- 15. Relationship between circle angle and circle center angle There is a chord in a circle with radius 1. If its length is root 3, then the degree of the circle angle to which the chord is opposite is equal to ()
- 16. A sector with a circumference of 12.56 cm, a radius of 2 cm and a central angle of 90 ° has an arc length of ()
- 17. If the length of an arc is 1 / 4 of the circumference of the circle, the angle of the center of the arc is ()
- 18. If a circle is divided into four sectors a, B, C and D, and the area ratio of sector ABCD is 2:1:4:5, what degree is the center angle of the largest sector
- 19. If the circumference of a sector with radius 2 is equal to the arc length of its semicircle, then the central angle of the sector is___ Radian, the sector area is___ .
- 20. In the circle center o with radius of 50 mm, chord AB is 50 mm long. Calculate the degree of angle AOB and calculate the distance from point O to ab by using the vertical diameter theorem