Question

The radius of Circle B is 4 centimeters and the
circumference of Circle A is 20 centimeters. Find CD.

Answer 1

$CD=14.37cm.$

What is a Circle?

• A circle is made up of all points in the same plane that are equidistant from one another. Only the bordering points make up the circle.
• The following are a few examples of circles in daily life: the bicycle's wheel. Dinner dish. Coin.
• A circle is a particular type of ellipse in mathematics or geometry where the eccentricity is zero and the two foci are congruent. A circle is also the location of points evenly spaced apart from the center. The radius of a circle is measured from the center to the edge.
• Thales is thought to have developed the first circle-related theorems around 650 BC. The features of circles and issues with inscribing and describing polygons are covered in Book III of Euclid's Elements. Finding a square with the same area as a given circle was one of the issues in Greek mathematics.

Find CD:

Let,

$r_{1}$ be a radius of Circle A

$r_{2}$ be a radius of Circle B

Given:

$r=4cm.$

Circumference: $2\pi r$

$2\pi r_{1} =20$

$r_{1} =\frac{10}{\pi }$

$CD=D_{1} +D_{2}$

$=2r_{1} +2rx_{2}$

$=2*(\frac{10}{\pi } )+2*4$

$CD=14.37cm.$

To learn more about the circle, refer to:

brainly.com/question/26594685

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