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Area of the circle = pi*7.82 = 191.134497

Approximate area = 3*82 = 192

Q: What is the approximate area of the circle with a radius of 7.8?

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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) = âˆš78. There is no simplification.

Multiply width by length to get the area. The answer would be 3432 square inches or 23.8 square feet.

Related questions

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.

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.

Rigel has a radius of about 78 solar radii or 0.363 AU.

x2 + y2 - 2x - 18y = -78 x2 - 2x + 1 + y2 - 18y + 81 = 81 + 1 - 78 (x - 1)2 + (y - 9)2 = 4 (x - 1)2 + (y - 9)2 = 22 So the radius of the circle is 2, and it's center is located at the point (1, 9).

Circumference of a circle = PI x D, so answer is 3.142 x 78 = 245.08 ft

Approximate longitude of India: 78°E