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 with a radius of 3 cm is ___ square centimeters. A. 3π B. 6π C. 9π D. 12π 相关知识点: 试题来源: 解析 C。本题考查圆的面积公式。半径为 3 cm 的圆的面积是 A = πr² = π×3² = 9π 平方厘米。反馈 收藏 ...
The area of a circle with radius 4 cm is ___. A. 8π cm² B. 12π cm² C. 16π cm² D. 20π cm² 相关知识点: 试题来源: 解析 C。圆的面积等于πr²,半径为 4 厘米,面积是π×4²=16π 平方厘米。A 选项半径为 2 倍根号 2 厘米的圆面积约为 8π 平方厘米;...
The area of a circle with a radius of 5 cm is ___. A. 25π cm² B. 10π cm² C. 5π cm² D. 75π cm² 相关知识点: 试题来源: 解析 A。本题考查圆的面积计算公式,圆的面积 = π×半径²。半径为 5cm,所以面积为 25π cm²。选项 B 计算错误,应为 25π cm...
5 Find the area of the circle with the following radii. Round the answer to two decimal places.(Use π =3.142)Cari luas bulatan yang mempunyai jejari seperti berikut. Bundarkan jawapan kepada dua tempat perpuluhan. (Guna π = 3.142)(a)Radius/Jejari 0.4 cm(b)Radius/Jejari 14 cm0.50cm...
The diameter of a circle is twice its ___. A. radius B. circumference C. area D. volume 相关知识点: 试题来源: 解析 A。“radius”是半径;“circumference”是周长;“area”是面积;“volume”是体积。圆的直径是半径的两倍。反馈 收藏
Circle Calculator Area Circunference Inputs: Radius: or Diameter or Circumference: Unit: Calculate Area Result: The area of a circle with radius 65 is 13270 Formulae: r = 65 d = 130 C = 408 A = πr2 = π(d2)2 A = C24π π = 3.1415 A = area C = circumference ...
A radius of a circle with area 36πcm2 is 6cm, The width of the rectangle is 6cm, A diameter of the circle is 12cm, so the length of the rectangle is 24cm, The perimeter of the rectangle is 2×(6+24)=60cm. 如果一个面积为36π 平方厘米的圆的半径等于一个矩形的宽度,并且这个圆的...
七、英语数学(翻译)(10分)1.Find the area of a circle with a radius of 8 centimeters.2.A right triangle has one angle that measures90°.七、英语数学(翻译)(10 分) 1.Find the area of a circle with a radius of 8 centimeters. 2.A right triangle has one angle that measures 90°. ...
Find the area of a circle with a radius of 7 units.搜索 题目 Find the area of a circle with a radius of 7 units. 答案 解析 null 本题来源 题目:Find the area of a circle with a radius of 7 units. 来源: 越分练习题 收藏 反馈 分享...