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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
Is the side length of a square equal to the radius of a circle?
The sum of π. 9 / square is equal to the area of a circle
Draw the largest circle in a square with an area of 20 square centimeters. What is the area of the circle?
If the radius of the circle is r cm, then the side length of the square is 2R cm,
According to the square area of 20 square centimeter, we can get: 2R × 2R = 20; after finishing, we can get: R2 = 5,
So the area of the circle is: 3.14 × 5 = 15.7 (square centimeter),
A: the area of the circle is 15.7 square centimeters
There is a largest square in the circle. The area of the square is 10 square centimeters. What is the area of the circle? Explain the reason
Half of the diagonal of a square is equal to the radius of the circle
So the area of the circle = π (√ 10x √ 2x0.5) x (√ 10x √ 2x0.5) = 5 π
Where √ 10 is the side length of the square and √ 10x √ 2 is the diagonal of the square
The area of the isosceles right triangle in the circle is 5 square centimeters. Find the area of the circle You have to explain why it's urgent. Come on
The isosceles right triangle in the circle is divided into two small triangles with equal area by connecting the vertex and the midpoint of the hypotenuse right triangle in the circle
5 △ 2 = 2.5 (square centimeter)
The area of each small triangle is equal to half of the product of two right angles
And the right angle side of each small triangle is the radius of the circle
The area of each small triangle is half the square of the radius of the circle
So the square of the radius of the circle is
2.5×2＝5
The area of the circle is
5 × 3.14 = 15.7 (square centimeter)
Draw a circle in the square. The known area of the square is 20 square centimeters. What is the area of the circle?
The answer is 15.7 cm!
Simple: 4x5 = 20
(3.14 except 4) X20
=0.785x20
=15.7 square centimeter
In a circle, make a square with its radius as its side length. The known area of the square is 16 square centimeters, and the area of the circle is______ .
14 × 16 = 50. 24 (square centimeter)
So the answer is: 50.24
Calculate the perimeter or area of the shadow part in the following figure respectively
（1）2×3.14×4÷2+3.14×4，
=12.56+12.56，
=12 (CM)
A: its circumference is 25.12 cm
（2）（20÷2）×（20÷2），
=10×10，
=100 (square centimeter)
A: the shadow area is 100 square centimeters
Calculate the perimeter and area of the shadow in the following figures
(1) The circumference of a circle: 3.14 × 10 = 31.4 (CM) the two lengths of a rectangle: 16 × 2 = 32 (CM) the perimeter of the shadow part: 31.4 + 32 = 63.4 (CM) (1) the area of the circle is subtracted by the area of the rectangle
Calculate the perimeter or area of the shadow part in the following figure respectively
（1）2×3.14×6÷2，
=3.14×6，
=18.84 (CM)
A: the circumference is 18.84 cm
（2）[3.14×（10÷2）2÷2-10×（10÷2）÷2]×2，
=[3.14×25÷2-10×5÷2]×2，
=[39.25-25]×2，
=14.25×2，
=28.5 (square centimeter)
A: the shadow area is 28.5 square centimeters
Use six squares of the same size to make a figure. The shadow area is 12 square centimeters. Can you figure out the total area of the blank part
No graph can be calculated
RELATED INFORMATIONS
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