3 years ago

Circumference of a circle

Mathematics

2 answers:

irakobra [83]3 years ago

5 0

Answer:

Multiply the radius by 2 to get the diameter.

Multiply the result by π, or 3.14 for an estimation.

That's it; you found the circumference of the circle.

Step-by-step explanation:

k0ka [10]3 years ago

4 0

Answer:

Step-by-step explanation:

the straight sides are just 4.5 *2 = 9 cm

the arcs are 2 $\pi$ r * Ф/360

where Ф= 50 for this problem

and r = 8

the inner arc is 2 $\pi$ (3.5) *50/360 = 3.05432

the outer arc is 2 $\pi$ (8)*50/360 = 6.98131

total is 19.0356

to 3 sig figs is 19.036 :)

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