Sagot :
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)