Calculation formula of sector arc length Pie is required in the formula

Calculation formula of sector arc length Pie is required in the formula

L=nπR/180
(n is the degree of the circle center angle, and R is the radius of the circle where the sector is located)

How to use the arc length to express the area of the sector (formula)

S=1/2lr
L is the arc length and R is the radius of the sector

Trigonometric function area formula Just the formula of area

s=1/2absinC
s=1/2acsinB
s=1/2bcsinA

Given that the radius of the sector is 16 and the center angle is 2 radians, the arc length of the sector is __

∵r=16， α= 2，
∴l=| α| r
=2 × sixteen
=32．
So the answer is: 32

1. The circumference of a sector is 20cm. When the center angle of the circle is how many radians, the sector area is the largest and the maximum What is the area? 2. The sector area is 25 square centimeters. Find the minimum value of the sector perimeter

1. The circumference of a sector is 20cm. When its center angle is how many radians, the sector area is the largest. What is the maximum area? [solution] if the center angle is n and the radius is r, then the arc length is L = nr20 = 2R + NRS = 1 / 2 * L * r = 1 / 2 * NR * r = 1 / 2 * (20-2r) r = (10-r) r = - R ^ 2 + 10R = - (R-5) ^ 2 + 25, that is, when r = 5, the area is the largest

If the circumference of the sector is 16 and the center angle is 2 radians, the sector area is the detailed process of high school mathematics. Thank you

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