= = ⋅ π = π ≈ 2 1.047 s rθ θ = 6 = 0.24 radian inches 25 6 3 84. = 6 meters; = 8 m2 r A meters; 78. θ = 120º = 120 ⋅ = 2π radians 1 2 = 3 r π (6)2 = θ = = 3 ⋅ 2π = 2π ≈ 6.283 meters 8 1 s rθ 3 2 8 = 18θ θ = 10 meters; = 1 radian r θ = 8 = 4 ≈ 0.444 radian 2 18 9 (10)2 79. = 1 = 1 ⎛ 1 ⎞ = 100 =25 A r 2θ m2 180 θ = A r 3 2 ⎜ ⎟ ⎝ ⎠ 2 2 4 = r = π radian 2 θ = 30º = 30 85. ⋅ π 80. 180 6 π π = 1 = 1 2 ⎛ ⎞ = ≈ 1.047 in = θ = 6 feet; 2 radians A r r 2θ 2 2 (6)2 (2) = 1 = 1 =36 A r 2θ ft 2 2 2 ( ) ⎜ ⎟ 2 2 ⎝ ⎠ 3
s = rθ = 2 ⋅ π = π ≈ 1.047 inches 6 3 θ = 6 = 0.24 radian 25 84. r = 6 meters; A = 8 m2 78. r = 3 meters; θ = 120º = 120 ⋅ π = 2π radians 1 2 79. 180 3 s = rθ = 3 ⋅ 2π = 2π ≈ 6.283 meters 3 r = 10 meters; θ = 1 radian 2 A = 1 r 2θ = 1 (10)2 ⎛ 1 ⎞ = 100 =25 m2 A = r θ 2 8 = 1 (6)2 θ 2 8 = 18θ θ = 8 = 4 ≈ 0.444 radian 18 9 ⎜ ⎟ 2 2 ⎝ ⎠ 4 85. r = 2 θ = 30º = 30 ⋅ π = π radian 80. r = 6 feet; θ = 2 radians 180 6 A = 1 r 2θ = 1 2 2 ⎛ π ⎞ = π ≈ 1.047 in 2 A = 1 r 2θ = 1 (6)2 (2) =36 ft 2 2 2 ( ) ⎜ ⎟ 2 2 ⎝ ⎠ 3
62514-0132318806_ISM_02-1.docx