11.4 Circumference &amp; Arc Length

# Ex m jk 2r o 360 c 60o j 16 in k 60 2 16 o 360 1

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Unformatted text preview: length of AB is: ( ( m AB ∗ 2πr o 360 ( Ex: Find the length of JK. Ex: m JK ∗ 2πr o 360 C 60o J 16 in. K ( ( 60 ∗ 2π (16 ) o 360 1 ∗32π 6 16.76 in. ( o 32π 6 Arc Length Corollary Observations Arc • The length of a semicircle is ½ the The circumference. circumference. 180o o • The length of a 90 arc is ¼ the circumference. circumference. 90 o Ex: Find the m LM. Ex: ( 16.76 in. L C M m LM length of LM = ∗ 2πr o 360 in. 8 m LM 16.76 = ∗ 2π ( 8) 0 360 16.76 m LM = o 16π 360 m LM 0.3334... = 360o 120.03 = m LM o ( ( ( ( ( ( ( Ex: Find the circumference of Ex Find circle C. circle R 10.2 cm 45o C S m RS length of RS = ∗ 2πr o 360 ( 45o 10.2 = ∗C o 360 360o (10.2) = C o 45 81.6 cm = C ( Assignment Assignment...
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## This note was uploaded on 02/12/2011 for the course MTG 3212 taught by Professor Jackson during the Spring '11 term at University of Florida.

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