A. radius B. diameter C. area D. perimeter 相关知识点: 试题来源: 解析 A。圆的周长公式 C = 2πr 中,r 是半径。B 选项“diameter”是直径;C 选项“area”是面积;D 选项“perimeter”是周长,和题目中的 C 重复。反馈 收藏
r=28cmr=28cm Thecircumference of a circleis equal toPiππtimes thediameterdd. π⋅(diameter)π⋅(diameter) Since thediameterddis equal to22times theradiusrr, theformulaforcircumferenceusingradiusis2πr2πr. 2π⋅(radius)2π⋅(radius) ...
The circumference of a circle is calculated by using the formula C = 2πr. If the radius is 3 centimeters, the circumference is approximately ___. A. 9.42 centimeters B. 18.84 centimeters C. 28.26 centimeters 相关知识点: 试题来源: 解析 B。本题考查圆的周长公式以及数学运算和英语表达。圆的...
Circumference length formula in terms of diameter C = π·d Circumference length formula in terms of area C = √4·π·A Questions this calculator can answer: How to find the perimeter of a circle with a radius of 70 m? A circle has a diameter of 140 m. What is its circu...
Circumference length formula in terms of diameter C = π·d Circumference length formula in terms of area C = √4·π·A Questions this calculator can answer: How to find the perimeter of a circle with a radius of 57 centimeters?
Circumference Formula You can find a circle’s circumference using its radius and the constant π using the formula: C = 2πr The circumferenceCis equal to 2 times pi times the radiusrof the circler. Pi is a mathematical constant with an approximate value of 3.141592… Pi can also be appr...
Whereas, since an ellipse has a shortest and longest radius, these two values are multiplied by each other instead of squaring one of them. Area of an Ellipse Formula Therefore, the formula for the area of an ellipse goes as follows: Area=π⋅a⋅b Within the above formula, "a" ...
Step 1: Find the radius using the area of the circle formula (A = πr2). Step 2: Now, substitute the radius value in the circumference formula (C = 2πr) to get the answer. Q6 Which formula is used to find the perimeter of a circle, when its area is given? If the area of...
Suppose we want to find the radius of the circle having a circumference of 50 cm. Let us first find the value of the same using the formula. We will have, Here circumference = 50 cm Now, we know that Circumference of a Circle = 2πr, where ...
We have a well-known formula for the circumference, or distance around, a circle when given its radius, r, This formula states that if a circle has radius r, then its circumference, C, is C=2πr. If we solve this formula for r, we get r...