Respuesta :
Answer:
1.
a.) 24in
b.)75.36in
c.)452.16in
Step-by-step explanation:
1a. The radius is half of the diameter, so all you have to do is add 12 + 12 which is 24.
1b. the circumfrence of a circle is C (Circumfrence)=[tex]2\pi r[/tex] so replace radius for 12 and then do 3.14(pi) x 2 which will get you 6.28 times 6.28 by 12 and you will get 75.36.
1c. Area=[tex]\pi r^{2}[/tex] so first do the radius by the second power, or [tex]r * r[/tex], susitute r for 12 and you will get 144, times 144 by pi and you will get 452.16in
Sorry I could not answer every question but hope this helps!
Answers (I did not round numbers, not sure if you needed that and to what decimal?
1. Given radius (R) = 12
Diameter = 2R = 24
Circumference = 2πR
= 75.398223686155
Area = πR2
= 452.38934211693
2. Given radius (R) = 4.4
Diameter = 2R = 8.8
Circumference = 2πR
= 27.64601535159
Area = πR2
= 60.821233773498
3. Given diameter (D) = 60
Radius = 1/2 D
= 30
Circumference = πD
= 188.49555921539
Area =
pi (D/2) ^2
= 2827.4333882308
4. Given diameter (D) = 1.8
Radius =
D/2
= 0.9
Circumference = πD
= 5.6548667764616
Area =
π( D/2 ) ^2
= 2.5446900494077
1. Given radius (R) = 12
Diameter = 2R = 24
Circumference = 2πR
= 75.398223686155
Area = πR2
= 452.38934211693
2. Given radius (R) = 4.4
Diameter = 2R = 8.8
Circumference = 2πR
= 27.64601535159
Area = πR2
= 60.821233773498
3. Given diameter (D) = 60
Radius = 1/2 D
= 30
Circumference = πD
= 188.49555921539
Area =
pi (D/2) ^2
= 2827.4333882308
4. Given diameter (D) = 1.8
Radius =
D/2
= 0.9
Circumference = πD
= 5.6548667764616
Area =
π( D/2 ) ^2
= 2.5446900494077
