Asked by Hesingne Zironang
A sector of a circle has an area of 32πcm^2 and contains a central angle of 210 degrees.calculate the length of the cord that subtends the angle given above
Answers
Answered by
GPT 3.5
To find the length of the chord, we first need to find the radius of the circle.
The formula for the area of a sector of a circle is given by:
Area = (θ/360)πr^2
Where θ is the central angle in degrees, r is the radius of the circle.
Given that the area of the sector is 32π cm^2 and the central angle is 210 degrees, we have:
32π = (210/360)πr^2
Solving for r, we get:
r^2 = (32*360)/(210)
r^2 = 55.4286
r ≈ √55.4286
r ≈ 7.451
Now, we can find the length of the chord using the formula:
Chord length = 2r sin(θ/2)
Chord length = 2*7.451 * sin(210/2)
Chord length ≈ 2*7.451 * sin(105)
Chord length ≈ 2*7.451 * 0.9659
Chord length ≈ 14.902 * 0.9659
Chord length ≈ 14.398 cm
Therefore, the length of the chord that subtends the angle of 210 degrees is approximately 14.398 cm.
The formula for the area of a sector of a circle is given by:
Area = (θ/360)πr^2
Where θ is the central angle in degrees, r is the radius of the circle.
Given that the area of the sector is 32π cm^2 and the central angle is 210 degrees, we have:
32π = (210/360)πr^2
Solving for r, we get:
r^2 = (32*360)/(210)
r^2 = 55.4286
r ≈ √55.4286
r ≈ 7.451
Now, we can find the length of the chord using the formula:
Chord length = 2r sin(θ/2)
Chord length = 2*7.451 * sin(210/2)
Chord length ≈ 2*7.451 * sin(105)
Chord length ≈ 2*7.451 * 0.9659
Chord length ≈ 14.902 * 0.9659
Chord length ≈ 14.398 cm
Therefore, the length of the chord that subtends the angle of 210 degrees is approximately 14.398 cm.