Conversion of angle and radian What angle is a radian equal to

Conversion of angle and radian What angle is a radian equal to

Is the angle unit of radian system. 1 radian is equal to 57.3 degrees, 1 radian is equal to 60 arc minutes, and 1 arc minute is equal to 60 arc seconds, so 1 arc second is 3600 radians, which is 0.01592 degrees

If the circumference of the sector is 16 and the center angle is 2 radians, what is the area of the sector

The answer is 16, assuming radius r, arc length = 2 (center angle) XR, perimeter = 2R + 2R = 4R = 16, r = 4, area s = 1 / 2x2x4 = 16

If the area of a sector is 1 and its circumference is 4, the radian number of its center angle is __

∵ the area of the sector is 1 and the perimeter is 4,
∴
one
2lr＝1
2r+l＝4 ， l=2，r=1，
‡ radians of sector center angle α= l
r=2．
So the answer is: 2

If the circumference of the sector is 16 and the center angle is 2 radians, what is the area of the sector? option A 16 B 32 C 16π D 32π

Perimeter L = arc length L + 2R
L = center of circle a * r = 2R
So r = 4
S=1/2 a*R*R=1/2*2*4*4=16
Sorry, I dropped an R when I counted it and didn't write it down
That's the above step. It's complete
It's just a few formulas. The sector is composed of arc length and two radii, so the circumference uses that. The arc length is equal to the center angle multiplied by the radius, and the area is equal to the center angle multiplied by half the square of the radius

If the arc length corresponding to the center angle of 2 radians is 4. Find the sector area corresponding to the center angle? And their calculation formula

If the arc length corresponding to the center angle of a = 2 radians is C = 4, find the sector area s corresponding to the center angle of the circle?
Circle radius of sector R = C / a = 4 / 2 = 2
Area of sector s = C * r / 2 = 4 * 2 / 2 = 4

I need all the mathematical formulas (from primary school to high school)

one   Number of copies × Copies = total   Total number ÷ number of copies = number of copies   Total number ÷ number of copies = number of each copy   two   1 multiple × Multiple = several multiples   Multiple ÷ 1 = Multiple   Multiple ÷ multiple = 1 multiple   three   speed × Time = distance   Distance ÷ speed