2. Find the diameter of the circle whose circumference is:
(a) 44cm
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- The diameter of the circle is 17 cm
Given;
The circumference of the circle is = 44cm
To find:
The diameter of the circle
We know that,
The diameter of a circle = 2 * radius (i.e. 2r)
So,
We can find the radius of the circle by using the circumference formula of the circle = 2πr units
⇒ 2 * 22/7 * r = 44
⇒ 44/7 * r = 44
⇒ r = 44 ÷ 44/7
[By transporting 44/7 to RHS]
⇒ r = 44 * 7/44
⇒ r = 7
Thus,
The radius of the circle is 7 cm
Now,
The diameter of the circle
= 2 * radius
= 2 * 7
= 14 cm
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- The formula for finding the area of the circle = πr²h units sq.
About circle,
The diameter is the longest chord which passes through the center of the circle.
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