The area values of the circles given in the attachment are :
- 28.26 cm²
- 50.24 in²
- 314 m²
- 12.56 cm²
- 254.34 ft²
- 4.52 km²
- 7850 in²
- 379.94 m²
- 19.63 cm²
- 200. 96 ft²
- 1256 m²
- 78.5 cm²
- 7.07 m²
- 113.04 in²
- 200. 96ft²
- 38.47 cm²
- 0.28 km²
- 3.14 cm²
Area of a circle =
[tex] {\pi} {r}^{2} [/tex]
Where, r = Radius
[tex] \frac{\pi {d}^{2} }{4} [/tex]
d = diameter
[tex]\pi = 3.14[/tex]
1.)
r = 3cm
Area = 3.14 × 3² = 28.26 cm²
2.)
r = 4 in
Area = 3.14 × 4² = 50.24 in²
3.)
r = 10 m
Area = 3.14 × 10² = 314 m²
4.)
r = 2cm
Area = 3.14 × 2² = 12.56 cm²
5.)
r = 9 ft
Area = 3.14 × 9² = 254.34 ft²
6.)
r = 1.2 km
Area = 3.14 × 1.2² = 4.52 km²
7.)
r = 50 in
Area = 3.14 × 50² = 7850 in²
8.)
r = 11 m
Area = 3.14 × 11² = 379.94 m²
9.)
r = 2.5 cm
Area = 3.14 × 2.5² = 19.63 cm²
10.)
d = 16 ft
Area = (3.14 × 16²) ÷ 4 = 200. 96ft²
11.)
d = 40 m
Area = (3.14 × 40²) ÷ 4 = 1256 m²
12.)
d = 10 cm
Area = (3.14 × 10²) ÷ 4 = 78.5 cm²
13.)
d = 3 m
Area = (3.14 × 3²) ÷ 4 = 7.07 m²
14.)
d = 12 in
Area = (3.14 × 12²) ÷ 4 = 113.04 in²
15.)
d = 16 ft
Area = (3.14 × 16²) ÷ 4 = 200. 96ft²
16.)
d = 7cm
Area = (3.14 × 7²) ÷ 4 = 38.47 cm²
17.)
d = 0.6 km
Area = (3.14 × 0.6²) ÷ 4 = 0.28 km²
18.)
d = 2 cm
Area = (3.14 × 2²) ÷ 4 = 3.14 cm²
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