Pleaseeeee help with this! Thank you so much!
1 answer:
Answer:
≈ 7.85 cm
Step-by-step explanation:
The area (A) of a circle is calculated as
A = πr² ( r is the radius )
given A = 225π , then
πr² = 225π ( divide both sides by π )
r² = 225 ( take square root of both sides )
r = = 15
the arc length is calculated as
arc = circumference × fraction of circle
= 2πr ×
= 2π × 15 ×
= 30π ×
=
≈ 7.85 cm ( to 2 dec. places )
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