Answered

Find the Area of the following circle
1.,d = 36m, A=_______
2.r = 24 ft. A= _______
3.d = 52 cm A=_______
4.d = 25 cm A=_______
5.r = 32 cm A=_______
6.d = 83 cm A=_______
7.d = 74 cm A=_______
8.r= 42 cm A=_______
9.r = 12 cm A=_______

Sagot :

NCTworldviz

Answer:

1. r = d/2

= 36m/2

r = 18m

A = πr²

= (3.14)(18m)²

= (3.14)(324m²)

A = 1,017.36m²

2. A = πr²

= (3.14)(24ft)²

= (3.14)(576ft²)

A = 1,808.64ft²

3. r = d/2

= 52cm/2

r = 26cm

A = πr²

= (3.14)(26cm)²

= (3.14)(676cm²)

A = 2,122.64cm²

4. r = d/2

= 25cm/2

r = 12.5cm

A = πr²

= (3.14)(12.5cm)²

= (3.14)(156.25cm²)

A = 490.63cm²

5. A = πr²

= (3.14)(32cm)²

= (3.14)(1,024cm)²

A = 3,215.36cm²

6. r = d/2

= 83cm/2

r = 41.5cm

A = πr²

= (3.14)(41.5cm)²

= (3.14)(1,722.25cm²)

A = 5,407.87cm²

7. r = d/2

= 74cm/2

r = 37cm

A = πr²

= (3.14)(37cm)²

= (3.14)(1,396cm²)

A = 4,298.66cm²

8. A = πr²

= (3.14)(42cm)²

= (3.14)(1,764cm²

A = 5,538.96cm²

9. A = πr²

= (3.14)(12cm)²

= (3.14)(144cm²)

A = 452.16cm²