结果1 题目 The formula for the circumference of a circle is C = 2πr. If the radius of a circle is 5 cm, what is the circumference? A. 10π cm B. 15π cm C. 20π cm D. 25π cm 相关知识点: 试题来源: 解析 C。周长 C = 2π×5 = 10π cm。 反馈 收藏 ...
In mathematics, the formula for the area of a circle is pi times the radius squared. If the radius of a circle is 4 centimeters, what is the area? A. 16 pi square centimeters B. 12 pi square centimeters C. 18 pi square centimeters D. 14 pi square centimeters ...
The formula for the area of a circle is A = πr². If the radius r is doubled, the new area will be ___ times the original area. A. two B. three C. four D. five 相关知识点: 试题来源: 解析 C。本题考查对数学公式中变量变化的理解以及英语表达中的倍数关系。当半径 r 加倍时...
Where "Area" is the circle's area. (pi) is a Mathematical constant with an approximate value of 3.14159. r is the radius of the circle, which is the distance squared (raised to the power of 2) from the circle's center to any point on its edge. ...
The radius of a circle is defined as a line segment that joins the center to the boundary of a circle. The distance from the center point to any endpoint on the circle is called the radius of a circle. Learn about the radius formulas with solved examples
If we have a circle in a square and r is the radius of the circle and x is the measurement outside the square. What will be the formula to find the area of the whole square using x and r? The area of a circle is given the formula A = 3.14 r , where r is the radius. If ...
The formula to get the area of a circle ("R" being the radius of the circle). Radius means the distance from the center of the circle to the edge.It means pi times radius squared which is the formula for finding the area of a circle. ...
The radius of a circle is the line segment from the center of a circle to a point on the boundary of a circle. Is a radius half of a diameter? Yes, the radius of a circle is half of the diameter because the diameter is the line segment that passes through the center of a circle...
A. diameter B. radius C. circumference D. area 相关知识点: 试题来源: 解析 D。本题考查数学词汇的名词辨析。A 选项“diameter”意为“直径”;B 选项“radius”意为“半径”;C 选项“circumference”意为“周长”;D 选项“area”意为“面积”。圆的面积是通过特定公式计算的。反馈...
Circumference of a Circle Formula The Circumference (or) perimeter of circle = 2πR where, R is the radius of the circle π is the mathematical constant with an approximate (up to two decimal points) value of 3.14 Again, Pi (π) is a special mathematical constant; it is the ratio of ...