math  8th grade
posted by Br .
I have a table to complete.Given that points A and B belong to a circle with centre O; If the area of the sector bounded by central angle AOB is 14.13cm squared and the measure of central angle AOB=45cm squared. What is the radius of the disk(cm)and what is the area of the disk(cm squared)

As = (45/360)Ac = 14.13cm^2.
0.125Ac = 14.13,
Ac=113.4cm^2 = Area of disk or circle.
3.14r^2 = 113.4cm^2,
r^2 = 36,
r = 6cm = radius of disk.
Respond to this Question
Similar Questions

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). (ii) … 
Math
1. Find the angle of smallest positive measure coterminal with an angle of the given measure: a. 520 b.  75 2. Points A (1,0) and B (.6,.8) are points on a unit circle O. If the measure of angle AOB = 0 {w/ a line in the middle} … 
Math
1. Find the angle of smallest positive measure coterminal with an angle of the given measure: a. 520 b.  75 2. Points A (1,0) and B (.6,.8) are points on a unit circle O. If the measure of angle AOB = 0 {w/ a line in the middle} … 
trigonometry
A sector AOB of a circle, centre O, radius r cm, where the acute angle AOB is theta radians. Given that the perimeter of the sector is 14 cm and that the area of the sector is 10 cm^2, evaluate r and theta. 
Geometry
ƒ¡ is a circle with center O . A and B are points on ƒ¡ such that the sector AOB has perimeter 40 . What is the measure of ÚAOB (in radians) when the area of the sector AOB is maximized 
geometry!
Γ is a circle with center O. A and B are points on Γ such that the sector AOB has a perimeter of 40. Amongst all circular sectors with a perimeter of 40, what is the central measure of ∠AOB (in radians) of the sector … 
mATH
MY ANSWER RECORDED BELOW 1. The circle graph represents a family’s monthly budget. If the total monthly budget is $5,000, how much does the family spend on items other than food and housing? 
MATH
1. The circle graph represents a family’s monthly budget. If the total monthly budget is $5,000, how much does the family spend on items other than food and housing? 
mathematics
AOB is a sector of a circle such that angle AOB=60 degrees Celsius and OB is r units long. the area of AOB is 
geometry
In a circle centered at point O, the ratio of the area of sector AOB to the area of the circle is . What is the approximate measure, in radians, of the central angle corresponding to ?