11.4 Circumference & Arc Length

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

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

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...
View Full Document

Ask a homework question - tutors are online