Asked by Sandy

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
Answered by Sandy
Please someone answer, Ms.Sue please anybody...? :( ??? :(
Answered by Sandy
NEED HELP!!! :( I'm new here so ..... i don't know :( ????!!!
Answered by Ms. Sue
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^
Answered by Sandy
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
Answered by Sandy
Is it a) 137.6mm2 is the answer because that's what I got ?
Answered by Sandy
I'm so sorry but i'm in a huge rush ms.sue :( !
Answered by Ms. Sue
Nope.

Did you use this formula?

A = pi * r^2



Answered by Sandy
Oops, I'm sorry i got confused the answer is pi(21)^2 = 1384.74
Answered by Ms. Sue
Right.