Question

More help ill give 30 points

Answer 1

1. radius of circle = 14 cm .

Circumference = 2πr

where,

• r is radius
• π = 22/7

`:\implies \: \:` 2 × 22/7 × 14

`:\implies \: \:` 2 × 22 × 2

`:\implies \: \:` 44 × 2

`:\implies \: \:` 88 cm.

Now,

Area of Circle = πr²

`:\implies \: \:` 22/7 × 14 × 14

`:\implies \: \:`22 × 2 × 14

`:\implies \: \:` 44 × 14

`:\implies \: \:` 616 cm².

2. Radius of circle = 11 in.

Circumference = 2πr

`:\implies \: \:` 2 × 22/7 × 11

`:\implies \: \:`44/7 × 11

`:\implies \: \:`484/7

`:\implies \: \:`69.14 cm

Area = πr²

`:\implies \: \:`22/7 × 11 × 11

`:\implies \: \:`22/7 × 121

`:\implies \: \:` 2622/7

`:\implies \: \:`374.5 cm²

3. Radius of circle = 13 in.

Circumference = 2πr

`:\implies \: \:` 2 × 22/7 × 13

`:\implies \: \:` 44 /7 × 13

`:\implies \: \:` 572/7

`:\implies \: \:` 81.71 mm

Area = πr²

`:\implies \: \:` 22/7 × 13 × 13

`:\implies \: \:` 22/7 × 169

`:\implies \: \:` 3718/7

`:\implies \: \:` 531.14 mm².

4. Radius of circle = 4.5 m

Circumference = 2πr

`:\implies \: \:` 2 × 22/7 × 4.5

`:\implies \: \:` 44/7 × 4.5

`:\implies \: \:` 198/7

`:\implies \: \:` 28.28 m

Area = πr²

`:\implies \: \:` 22/7 × 4.5 × 4.5

`:\implies \: \:` 22 × 20.25/7

`:\implies \: \:` 445.5/7

`:\implies \: \:` 63.64 m²

5. Radius of circle = 9.2 yd.

Circumference = 2πr

`:\implies \: \:` 2 × 22/7 × 9.2

`:\implies \: \:`44/7 × 9.2

`:\implies \: \:` 404.8/7

`:\implies \: \:` 58.34 yd

Area = πr²

`:\implies \: \:` 22/7 × 9.2 × 9.2

`:\implies \: \:` 22/7 × 84.64

`:\implies \: \:` 1862.08/7

`:\implies \: \:` 266.01 yd²