the ratio of the circumference of circle with radius R to its area
Answers
Given : A circle with radius r
To find : ratio between the circumference and area of the circle
Solution:
Area of a circle =π *( radius of circle)²
Circumference of a circle = 2 * π * radius of circle
radius of circle = r
Area of the circle = πr²
Circumference of the circle = 2πr
ratio between the circumference and area of the circle
= Circumference of the circle /Area of the circle
= 2πr / πr²
= 2/r
Hence ratio between the circumference and Area of a circle of radius r is 2/r
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Answer:
Area of a circle = *(radius of circle)² Circumference of a circle = 2 * * radius of circle
radius of circle = r
Area of the circle = Tr²
Circumference of the circle = 2πr
ratio between the circumference and area of the circle
= Circumference of the circle /Area of the circle
= 2πr / Пr²
= 2/r
Hence ratio between the circumference and
Area of a circle of radius r is 2/r.