math

A sector in a circle of radius 8.1 m has an area of 53.5 m^2. The central angle in a sector must be _____o. Round to one decimal place.

  1. 0
  2. 1
asked by Emma
  1. Hint:
    a sector is a pie-piece, similar to a slice of pizza.

    The area of a sector of a given radius is proportional to the central angle.

    Area of Sector
    --------------
    Area of circle

    central angle
    =-------------
    360°

    posted by MathMate
  2. okay thanks!

    posted by Emma
  3. You're welcome!

    posted by MathMate

Respond to this Question

First Name

Your Response

Similar Questions

  1. math

    A sector of a circle subtending an angle 300 degrees at the centre is used to form a cone with base radius 6cm. Find the (a.)radius of the circle (b.)volume of the cone (c.)area of the minor sector of the circle
  2. can xome1 help me plzz im stuck

    HELP PLZZ...A circle has radius 2 cm,(in that circle there is a traingle ABO) O is the centre of the circle. the chord AB has length 3 cm. . BO is 2cm AO is 2cm (i) Show that ÚAOB is 1.696 radians (to three decimal places).
  3. How do i do this maths question??

    A sector of a circle with radius r cm contains an angle of θ radians between the bounding radii. Given that the perimeter of the sector is 7cm, express θ in terms of r and show that the area is r/2(7-2r)cm square. Hence, find
  4. Mathematics

    Mathematics: A chord of radius 12cm subtends an angle of 150 degree at the centre of the circle. Calculate. A. Perimeter of the circle (Ps) B. Area of the circle. (Account) C. Length of the circle (Lc) D. Length of the arc (Last)
  5. Mathmatics

    A sector of a circle of radius 9 cm subtends angle 120 at center of the circle find the area of the sector to the nearest cm
  6. trigonometry

    please check my answers. 1.Find the area of the sector of a circle. r=11.8cm, theta-pi/7 radians I got 31.2cmsquared 2.Find the radius of a circle in which a central angle of pi/6radian determines a sector of area 76square meters.
  7. maths geomentry help!!!

    the area of a sector PQR is a @rad.and the radius of the of the circle is rcm,the area of the sector is 20cm^2 and the perimeter is 26cm.find r?
  8. Math

    A sector of a circle has a radius 5cm The area of the sector is 5π Work out the arc length
  9. math

    area of a sector of a circle of radius 36 cm is 54 pie cm square . find the length of the corresponding arc of the sector
  10. TRIG HELP ASAP

    I really need help on this problem. A sector has area of 15 in^2 and central angle of 0.2 radians. Find the radius of the circle and arc length of the sector

More Similar Questions