Question

A circle has a diameter of 6 millimeters. What are the circumference and area of the circle? Use 3.14 for pie. Round to the nearest tenth.

a. 18.8mm;28.3mm2
b. 9.4mm;113.0mm2
c. 18.8mm;113.0mm2
d. 9.4mm;28.3mm2.

Answer 1

Circumference = pi * d

where d = diameter

you have both numbers

3.14 for pi
times
6 for d

so

3.14 * 6 = ...?

Answer 2

= what

Answer 3

what is 3.14 times 6?

Answer 4

is it 18.84

Answer 5

yes it is!

Answer 6

round it to the nearest tenth...

Answer 7

what is it a b c or d

Answer 8

Getting there...so you know circumference = 18.8mm

Area...is pi * r²

to find r (radius) you divide the diameter you have by 2

so what is 6 / 2 ?

Answer 9

idk