Question

A circular shape is obtained from a 44 cm long wire. What is the radius
of the circle?
​

Answer 1

Answer:

Radius of the given circular shape = 7cm

Step-by-step explanation:

the length of the circular wire = 44cm

the length of the wire=perimeter of a circle

2πr=44cm

=>2×22/7×r = 44

=>r ×44/7 =44

=>r = 44×7/44

=>r = 7 cm

Answer 2

$\large\bf\underline{Given:-}$

• length of wire = 44cm

$\large\bf\underline {To \: find:-}$

• Radius of circle.

$\huge\bf\underline{Solution:-}$

Circular shape is obtained from a 44cm long wire.

• ✦ Length of wire = perimeter of circle = 44cm

$\large \bf \dag \: perimeter \: of \: circle = 2 \pi \: r$

$\longrightarrow \rm \: 2 \pi \: r = 44cm \\ \\ \longrightarrow \rm \: \pi \: r = \cancel \frac{44}{2} \\ \\ \longrightarrow \rm \: \pi \: r = 22 \\ \\ \longrightarrow \rm \: \frac{22}{7} \times r = 22 \\ \\ \longrightarrow \rm \: r = \cancel{22} \times \frac{7}{ \cancel{22} } \\ \\\longrightarrow \rm \: r =7$

So, Radius of circle is 7cm.

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Some Important concept's

• r = Radius
• π = 22/7

• Perimeter of circle = 2πr
• Area of circle = πr² sq.units.

★ perimeter of circle is also known as Circumference.