Question

2. Find the circumference of the following.
A circle with radius 63 cm
b. A circle with diameter 8.4 m

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Answer 1

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We know,

※Circumference of circle = 2πr

★Where,

☆r is radius of circle.

☆π is 22/7 or 3.14.

_________________________________

a. A circle with radius 63 cm.

r = 63 cm

Put r in circumference formula

2 × 22/7 × 63

44/7 × 63

2772/7

396

★Therefore,

Circumference of circle is 396 cm.

_________________________________

b. A circle with diameter 8.4 m.

r = Diameter/2

= 8.4/2

= 4.2

Radius (or r) of circle is 4.2 m

Now, Put r in circumference formula :

2 × 22/7 × 4.2

44/7 × 4.2

184.8/7

26.4

★Therefore,

Circumference of circle is 26.4 m.

Thank uh ♡

Answer 2

Answer:

We know,

※Circumference of circle = 2πr

★Where,

☆r is radius of circle.

☆π is 22/7 or 3.14.

_________________________________

a. A circle with radius 63 cm.

r = 63 cm

Put r in circumference formula

2 × 22/7 × 63

44/7 × 63

2772/7

396

★Therefore,

Circumference of circle is 396 cm.

_________________________________

b. A circle with diameter 8.4 m.

r = Diameter/2

= 8.4/2

= 4.2

Radius (or r) of circle is 4.2 m

Now, Put r in circumference formula :

2 × 22/7 × 4.2

44/7 × 4.2

184.8/7

26.4

★Therefore,

Circumference of circle is 26.4 m.