+394 Find the circumference of each circle given its radius or diameter. (Round your answers to two decimal places.)
(a) d = 18 in
________ in
(b) r = 7 m
_______ m
(c) 10 cm
_______ cm
(d) 4.5 ft
_____ ft
Find the circumference of each circle given its radius or diameter. (Round your answers to two decimal places.)
+399 The formula for circumference is \(d\pi\).
a) \(d = 18\), so your circumference would be \(18\pi\) inches. Since it is asking to round your answer, we need to multiply \(18\) by \(\pi\), which rounds to \(56.55\) inches.
b) If \(r = 7\), \(d = 14\). Your circumference would be \(14\pi\) which equals \(43.98\) m.
c) If \(10\) is the diameter, your circumference would be \(10\pi = 31.42\) cm. If \(10\) is the radius, your circumference would be \(20\pi = 62.83\) cm.
d) If \(4.5\) is your diameter, your circumference would be \(4.5\pi = 14.14\) feet. If \(4.5\) is your radius, your circumference would be \(9\pi = 28.27\) feet.
- Daisy
