A. square meter B. cubic meter C. meter D. centimeter 相关知识点: 试题来源: 解析 A。圆的面积单位是平方米等。“cubic meter”是体积单位;“meter”和“centimeter”是长度单位。易错点是容易把长度单位和面积单位混淆。区分方法是记住圆面积单位带有“square”。反馈...
What is the ratio between the side of thesquare and the radius of the circle?(a) √x:1(b)1:vx(c)1:x(d) ∴:1 相关知识点: 试题来源: 解析 Area ofclrcle=xsiny Areaofsin(e=a^2 xr^2=a^2 π=(a^2)/(b^2) π=(-4/2)^2 √π/1=a/r、元:1Ansop+lm A 反馈 收藏 ...
The formula for the area of a circle is ___. A. πr² B. pie r square C. pi times r squared D. the square of pi r 相关知识点: 试题来源: 解析 C。选项 A 是数学符号表达,不是英语表达。选项 B“pie”拼写错误,应该是“pi”,且“square”缺少动词形式。选项 C 表达正确,“ti...
Merriam-Webster unabridged Popular in Grammar & Usage See All Point of View: It's Personal Plural and Possessive Names: A Guide What's the difference between 'fascism' and 'socialism'? More Commonly Misspelled Words Words You Always Have to Look Up ...
The area of a circle with a radius of 3 cm is equal to the area of a square. What is the side length of the square? A. 3 cm B. 3π cm C. 3√π cm D. 9 cm 相关知识点: 试题来源: 解析 C。解析:圆的面积为π×3×3 = 9π平方厘米。设正方形边长为 a,则 a×a = 9π,...
The area of a circle is 28.26 square meters. What is the radius of the circle? A. 3 meters B. 6 meters C. 9 meters D. 1.5 meters 相关知识点: 试题来源: 解析 A。圆的面积公式是:面积 = π×半径×半径,π取 3.14。28.26÷3.14 = 9,9 = 3×3,所以半径是 3 米。
, What is the area of a circle whose diameter is as long as the diagonal of that square( ).A. 72π B. 36π C. 24π D. 18π 相关知识点: 试题来源: 解析 D The square's side is 6 and its diagonal is √62+62=√72, The area of the circle is πr2=π(√722)(√722)=72...
The area of a circle is 40 square meters. The area of a rectangle is 38 square meters. Which is larger? A. The circle B. The rectangle C. They are equal D. Can't tell 相关知识点: 试题来源: 解析 A。这里比较圆和长方形的面积。圆的面积是 40 平方米,长方形面积是 38 平方米,40...
The area of a circle is 3.14 square decimeters. What is the radius of the circle? A. 1 decimeter B. 1 meter C. 1 kilometer D. 1 millimeter 相关知识点: 试题来源: 解析 A。圆的面积公式为πr²,已知面积为 3.14 平方分米,π取 3.14 时,半径 r 的平方为 1,所以半径为 1 分米。选项 ...
If the area of a circle is 36π square centimeters, what is the radius of the circle? The formula for the area of a circle is A = πr². A. 6 centimeters B. 8 centimeters C. 4 centimeters D. 10 centimeters 相关知识点: