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Divide the area by the value of Pi to get the diameter. Divide the diameter by 2 to get the radius !

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Q: What is the radius of a circle that has an area of 78 cm2?
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What is the radius of a circle with a 78 inch circumference?

Radius = 12.414 inches (to 3 dp)

How many square feet in a 10 foot diameter circle?

Area = pi x radius x radius (pi = 3.14) Area = 3.14 x 5 x 5 Area = 78.5

What is the area of a rectangle with a length of 12 cm and a width of 6.5 cm?

78 cm2

The Radius equals 5 in and what is the area?

Roughly 78

The arc on a circle is 78 degrees the radius is 14 how large is the arc?

The arc is: 19.06 units

If the ratio of a circle's sector to its total area is 78 what is the measure of its sector's arc?

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.

What is the radius of Rigel?

78 R

What is the radius of the star Rigel?

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

How many yards of fabric are in a circle with 132 inch diameter?

Area of circle of 132 inch diameter = 13684*78 sq inches = 10.56 sq yards.

What is the percent area cleaned by the wiper if the 180 degree rotational wiper diameter D is equal to the length of the solar panel D equals 156Cm and Breath of solar panel equals 78Cm?

Area covered by the wiper is that of a semi-circle with diameter D, or the length of the solar panel - 156 cm.So the area = (1/2)*(PI/4)*(D2) = (1/2)*(PI/4)*(156cm2) = 9556.72 cm2Now find the area of the solar panel: area = length*width = 156 cm * 78 cm = 12,168 cm2Now % area cleaned will be the area of the wiper / area of the panel:9556.72 cm2 / 12168 cm2 * 100% = 78.5%

The diameter of a round dinner plate is 10 in what is the area of the plate?

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.

What is the circumference of a 78 inch circle?

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

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