Question

if circumfurence is 72.6 then what is the radious and diameter in easy

Answer 1

Answer:

$Circumference \: of \: circle=72.6cm \\ </p><p>2πr=72.6 \\ </p><p>2× \frac{22}{7} ×r=72.6 \\ </p><p>r=72.6× \frac{1}{2} × \frac{7}{22} \\ </p><p>r=\frac{3.3 \times 7}{2} \\ </p><p>r=\frac{23.1}{2} \\ </p><p>r=11.55cm \\ </p><p>d=2r=2(11.55)=23.1cm$

Answer 2

Given:

• Circumference = 72.6cm

To find:

• Radius
• Diameter

Solution:

We know,

✦Circumference of a circle=2πr

And,

✦ π = 22/7

Putting the values,

⇒ 72.6 = 2πr

⇒ 72.6 =2(22/7)(r)

⇒ r = 72.6×7/44

⇒ r = 11.55

∴Radius = 11.55cm.

Now,

Using the formula:

✦Diameter = 2×radius

Putting the values,

⇒Diameter = 2×11.55

                = 23.7cm.

∴Diameter = 23.7cm

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Know more:-

Radius:

• The distance from the center to the circumference of a circle.
• It is half the diameter of the circle

Diameter:

• The distance between one point on a circle through the center to another point on the circle.
• It is twice the radius

Perimeter of a semi-circle:

• πr

Area of circle:

• πr²

Area of semicircle:

• πr²/2

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