10 Find the radius of each circle if the area of the sector is 12. 73-74 moves t

Question

10 Find the radius of each circle if the area of the sector is 12. 73-74 moves throug 64. 0.7 150° 65. Find the area of a sector with central angle 2/3 rad in a 66. A sector of a circle has a central angle of 145°. Find the area 74. 67. The area of a sector of a circle with a central angle of 140° is 68. The area of a sector of a circle with a central angle of 73. circle of radius 10 m. of the sector if the radius of the circle is 6 ft. 70 m2. Find the radius of the circle. Sm/12 rad is 20 m2. Find the radius of the circle. Find the central angle (in radians) of the sector. this circle that subtends a central angle of 3 rad. AP 75 69. A sector of a circle of radius 80 mi has an area of 1600 mi. 70. The area of a circle is 600 m2. Find the area of a sector of 76

Explanation / Answer

65. Area of sector= (n/360) pi r2

Here n= 2pi/3 = 120 degree

A=(120/360) pi *100 = 100pi/3

67. 70=(140/360)pi r2

r2= 70 *360/(140 pi)=57.3

r= sqrt57.3=7.57

69.1600=(n/360)pi *802

1/4= (n/360)pi

npi =90 degree

n= 90/ pi=28.6 degree

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