Area of the circle = pi*7.82 = 191.134497
Approximate area = 3*82 = 192
Area = pi x radius x radius (pi = 3.14) Area = 3.14 x 5 x 5 Area = 78.5
Length of arc = angle of arc (in radians) × radius of circle With a ratio of 7:8 the area of the sector is 7/8 the area of the whole circle. This is the same as saying that the circle has been divided up into 8 equal sectors and 7 have been shaded in. Dividing the circle up into 8 equal sectors will give each sector an angle of arc of 2π × 1/8 7 of these sectors will thus encompass an angle of arc of 2π × 1/8 × 7 = 2π × 7/8 = 7π/4 Thus the length of the arc of the sector is 7π/4 × radius of the circle. --------------------------------- Alternatively, it can be considered that as 7/8 of the area is in the sector, the length of the arc is 7/8 the circumference of the circle = 7/8 × 2π × radius = 7π/4 × radius.
12*6.5 = 78 square cm
sqrt(78) = √78. There is no simplification.
90-78= 12 degrees
Divide the area by the value of Pi to get the diameter. Divide the diameter by 2 to get the radius !
Radius = 12.414 inches (to 3 dp)
Area = pi x radius x radius (pi = 3.14) Area = 3.14 x 5 x 5 Area = 78.5
Roughly 78
The arc is: 19.06 units
Length of arc = angle of arc (in radians) × radius of circle With a ratio of 7:8 the area of the sector is 7/8 the area of the whole circle. This is the same as saying that the circle has been divided up into 8 equal sectors and 7 have been shaded in. Dividing the circle up into 8 equal sectors will give each sector an angle of arc of 2π × 1/8 7 of these sectors will thus encompass an angle of arc of 2π × 1/8 × 7 = 2π × 7/8 = 7π/4 Thus the length of the arc of the sector is 7π/4 × radius of the circle. --------------------------------- Alternatively, it can be considered that as 7/8 of the area is in the sector, the length of the arc is 7/8 the circumference of the circle = 7/8 × 2π × radius = 7π/4 × radius.
78 R
Rigel has a radius of about 78 solar radii or 0.363 AU.
Area of circle of 132 inch diameter = 13684*78 sq inches = 10.56 sq yards.
The area of the plate is equal to pi times the square of the radius. Since the plate has a 10 inch diameter, the radius is 5 inches. Therefore, the area is equal to pi times 25, or about 78. 5 inches.
Approximate longitude of India: 78°E
Circumference of a circle = PI x D, so answer is 3.142 x 78 = 245.08 ft