Answer:
1. d = 2r
= 2(6)
=12cm
r² = 6²
= 36cm²
A = πr²
= (3.14)(36)
=113.04cm²
2. r = d/2
= 14/2
= 7cm
r² = 7²
= 49cm²
= (3.14)(49)
= 153.86cm²
3. r = √(r²)
= √64
= 8cm
d = 2r
= 2(8)
= 16
= (3.14)(64)
=200.96cm²
4. d = 2r
= 2(9.5)
= 19ft
r² = 9.5²
= 90.25ft²
= (3.14)(90.25)
= 283.385
= 283.39ft²
5. r = d/2
= 11/2
= 5.5in
r² = 5.5²
= 30.25in²
= (3.14)(30.25)
= 94.985
= 94.99in²
6. r = d/2
= 5/2
= 2.5in
r² = 2.5²
= 6.25in²
= (3.14)(6.25)
= 19.625
= 19.63in²
7. r = √(r²)
= √81
= 9cm
= 2(9)
= 18cm
= (3.14)(81)
= 254.34cm²
8. d = 2r
= 2(12)
= 24cm
r² = 12²
= 144
= (3.14)(144)
= 452.16cm²
9. r = d/2
= 4/2
= 2cm
r² = 2²
= 4cm²
= (3.14)(4)
= 12.56cm²
10. d = 2r
= 16ft
r² = 8²
= 64ft²
= 200.96ft²
Copyright © 2024 EHUB.TIPS team's - All rights reserved.
Answers & Comments
Answer:
1. d = 2r
= 2(6)
=12cm
r² = 6²
= 36cm²
A = πr²
= (3.14)(36)
=113.04cm²
2. r = d/2
= 14/2
= 7cm
r² = 7²
= 49cm²
A = πr²
= (3.14)(49)
= 153.86cm²
3. r = √(r²)
= √64
= 8cm
d = 2r
= 2(8)
= 16
A = πr²
= (3.14)(64)
=200.96cm²
4. d = 2r
= 2(9.5)
= 19ft
r² = 9.5²
= 90.25ft²
A = πr²
= (3.14)(90.25)
= 283.385
= 283.39ft²
5. r = d/2
= 11/2
= 5.5in
r² = 5.5²
= 30.25in²
A = πr²
= (3.14)(30.25)
= 94.985
= 94.99in²
6. r = d/2
= 5/2
= 2.5in
r² = 2.5²
= 6.25in²
A = πr²
= (3.14)(6.25)
= 19.625
= 19.63in²
7. r = √(r²)
= √81
= 9cm
d = 2r
= 2(9)
= 18cm
A = πr²
= (3.14)(81)
= 254.34cm²
8. d = 2r
= 2(12)
= 24cm
r² = 12²
= 144
A = πr²
= (3.14)(144)
= 452.16cm²
9. r = d/2
= 4/2
= 2cm
r² = 2²
= 4cm²
A = πr²
= (3.14)(4)
= 12.56cm²
10. d = 2r
= 2(8)
= 16ft
r² = 8²
= 64ft²
A = πr²
= (3.14)(64)
= 200.96ft²