The area of the sector formed by the 110 degree central angle is 50 units squared. What is the radius of this circle??

The area of the sector formed by the 110 degree central angle is 50 units squared What is the radius of this circle class=

Respuesta :

caylus
Hello,
Let make a rule of three.

For 360° area of the circle is π R²
For 1° ............of the sector .. πR²/360
For 110° ............................... πR²*110/360 =50(units squared)

R²=50*360/(110π)
==>R=6*√(50/(11π))≈7,217137....(units)




Answer:

Area of the sector(A) is given by:

[tex]A = \pi r^2 \cdot \frac{\theta}{360^{\circ}}[/tex]

where,

r is the radius of the circle and  [tex]\theta[/tex] is the central angle in degree.

As per the statement:

The area of the sector formed by the 110 degree central angle is 50 units squared.

⇒A = 50 units squared and [tex]\theta = 110^{\circ}[/tex]

Substitute these in [1] and use 3.14 for pi we have;

[tex]50 = 3.14 \cdot r^2 \cdot \frac{110}{360}[/tex]

⇒[tex]50 = 0.959444446r^2[/tex]

Divide both sides by 0.959444446 we get;

[tex]r^2 = 52.1134915[/tex]

⇒[tex]r = \sqrt{52.1134915}[/tex]

Simplify:

r ≈ 7.22 units

Therefore, the radius of this circle is, 7.22 units