# Trigonometry

31). Find the area of the sector of a circle with a radius of 18 inches and a central angle of pheta=120 I put the info in A=1/2r^2pheta so that it read A=1/2(324)9pi/10. But I got 458.04, not the answer of 339.29. What did I do wrong?

1. 👍 0
2. 👎 0
3. 👁 270
1. 120 degrees is a third of a circle, or 2PI/3 Where did you get 9PI/10?

The Greek letter Theta, I think, you are using.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Math

A quarter-circle with radius \$5\$ is drawn. A circle is drawn inside the sector, which is tangent to the sides of the sector, as shown. Find the radius of the inscribed circle. The rest is in asymptote size( 100 ) ; // Not to

asked by John on March 22, 2020
2. ### maths

calculate the area of a sector of a circle which subtends an angle of 45° at the centre of the circle, radius 14cm

asked by hassan on May 30, 2019
3. ### Solid Mensuration

A circle having an area of 452 square inches is cut into two segments by a chord, which is 6 inches from the center of the circle. Find the area of the bigger segment.

asked by Sol on November 30, 2014
4. ### Mathematics

A sector of a circle of radius 7cm subtends angle 270° at the centre. Calculate a. Length of arc b. Area of sector c. Perimeter of sector

5. ### Maths

A sector of a circle of radius 7cm subtending an angle of 270 degree at centre of the circle is use to form a cone? (A)find the base radius of the cone. (B)calculate the area of the base of the cone.

asked by Victor on February 2, 2016
1. ### Geometry

1.What is the perimeter of a rectangle with width 10 inches in length 13 inches? A.23inches B.36inches C.46inches*** D.130inches 2.What is the area of a triangle with base 19 inches and height 11 inchinches? A.209square inches

asked by GummyBears18 on September 6, 2016
2. ### maths

A sector of a circle of a radius 6cm subrends angle of 105 at the centre of a circle.calculate the perimeter of the sector and the area of the sector?

asked by success on October 5, 2019
3. ### Maths

A sector of a circle of radius 8cm is bent to form a cone. Find the radius of the cone and it's vertical angle if the angle substended at the centre by the sector is 280°

asked by Amarachi on June 10, 2018
4. ### maths

find the angle of a sector of a circle of radius 35cm is 288' find the perimeter of the sector

asked by ugochukwu on May 16, 2016
5. ### pre-calc

Find an angle between 0 and 2ð that is coterminal with the given angle. -8pi/3 A sector of a circle has a central angle of 60°. Find the area of the sector if the radius of the circle is 3 mi.

asked by John on March 17, 2012
6. ### 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

asked by shegster on April 30, 2014