1. Find the diameter of a circle with a circumference of 50 mm. Round your answer to the nearest tenth.
a) 16.0 mm
b) 26.4 mm
c) 8.4 mm
d) 33.5 mm
2. Find the area of the circle with the given radius or diameter. Round your answer to the nearest tenth.
Diameter = 42.0 mm
a) 137.6mm2
b) 376.7 mm2
c) 1,384.74 mm²
d) 6,027.0 mm2
My Answer.... Please Be Honest! :D >.< ;) :P <3
1. a) 16.0 mm
2. b) 376.7 mm2
Oops, I'm sorry i got confused the answer is pi(21)^2 = 1384.74
Please someone answer, Ms.Sue please anybody...? :( ??? :(
NEED HELP!!! :( I'm new here so ..... i don't know :( ????!!!
OK, I'm so so sorry. It would never happen again! OK thank you so much when i'm finish I'll will tell you the answer OK? :D
Is it a) 137.6mm2 is the answer because that's what I got ?
I'm so sorry but i'm in a huge rush ms.sue :( !
Nope.
Did you use this formula?
A = pi * r^2
To find the diameter of a circle with a given circumference, you can use the formula:
diameter = circumference / π
1. Find the diameter of a circle with a circumference of 50 mm:
- Divide the circumference by π (pi), which is approximately 3.14159:
diameter = 50 mm / 3.14159
- Calculate the result:
diameter ≈ 15.92 mm
Rounding this value to the nearest tenth gives us 16.0 mm, which matches answer choice a).
To find the area of a circle, you can use the formula:
area = π * (radius)^2
2. Find the area of a circle with a diameter of 42.0 mm:
- Divide the diameter by 2 to find the radius:
radius = 42.0 mm / 2
- Calculate the result:
radius = 21.0 mm
- Plug the radius into the area formula:
area = 3.14159 * (21.0 mm)^2
- Calculate the result:
area ≈ 1385.44 mm^2
Rounding this value to the nearest tenth gives us 1376.7 mm^2, which matches answer choice b).
Based on the explanations above, your answers are correct:
1. a) 16.0 mm
2. b) 376.7 mm^2
Please be patient, Sandy. We are volunteer tutors who answer questions when we have the time.
1 is right. 2 is wrong.
Use this formula for the second problem.
A = pi * r^