Geometry
posted by Courtney .
The measure of the central angle of a sector of a circle is 90degrees. The arc length of the sector is 3(pie) cm. What is the radius of the circle?

Geometry 
Bosnian
The circumference of the circle = 2 r pi
The measure of the sector 90 ° = ( 1 / 4 ) 2 r pi = r pi / 2
r pi / 2 = 3 pi Divide both sides by pi
r / 2 = 3 Multiply both sides by 2
r = 2 * 3
r = 6 cm 
Geometry 
Courtney
Thanks so much!

Geometry 
Alondra
A circke has an arc length of 10 feet. The central angle formed os 60°. What is the area of the sector?
Respond to this Question
Similar Questions

trigonometry
please check my answers. 1.Find the area of the sector of a circle. r=11.8cm, thetapi/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. … 
geometry
11. Infinitely many different sectors can be cut from a circular piece of paper with a 12cm radius, and any such sector can be fashioned into a paper cone with a 12cm slant height. (a) Show that the volume of the cone produced by … 
Geometry
Infinitely many different sectors can be cut from a circular piece of paper with a 12cm radius, and any such sector can be fashioned into a paper cone with a 12cm slant height. (a) Show that the volume of the cone produced by the … 
trig
In a circle of radius 12 inches, a sector is formed by a central angle of pie/4 radians. Find the area of the sector to the nearest hundredth of a square inch. 
geometry
FIND THE LENGTH OF THE RADIUS OF THE CIRCLE IS 9cm. THE ARC OF THE SECTOR MEASURES 60 DEGREES. FIND THE AREA OF THE SECTOR. 
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 
Geometry
The circumference of a circle is 20 pi cm. Find diameter, radius, and area of the disk, the length of an arc of 90 angle and area of a 90 angle sector. Answer in terms of pi. d= ___ r= _____, disk area= _______ arc length =______, … 
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 
apex geometry
Hannah constructed two similar circles as seen in the image below. If the arc length of the larger circle is , which of the following would be true? 
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) E. …