0
The area of a circle is calculated using the following formula:
Area = π r^2
If the radius ("r") is 25 yd, then:
Area = π (25)^2
Area = 1963.5 square yards
Wiki User
∙ 7y ago
Add your answer:
Earn +20 pts
If you divide a radius of a circle by 2 what will happen to the area?
If the radius of a circle becomes 1/2 as long, the area becomes 1/4 as much.
How do you find the circumference of a circle without knowing the radius and area?
You will have to measure some part of the circle. As long as you have absolutely no information about a circle, you can't do any calculations.
What is the length of this radius of the circle?
To find the radius you should either know the area or the circumference. The area is found by multiplying the radius squared by pi which is 3.14159 The equation is ... A=pi x r2 The area is the total amount of space inside the circle The circumference is found by multiplying 2 and pi and radius together. The equation is ... C=2 x pi x r The circumference is the total amount of length around the outside of the circle. So with this information you should be able to find the length of the radius. If your not sure what the radius is. The radius is the length from the center of the circle to one of the points on the outer side of the circle. The radius is the same distance to any point on the outer side of the circle as long as the radius starts in the middle point of the circle.
Find the area of a circle with a diameter of 5 inches long?
pi x 2.5 squared because 2.5 is the radius. the radius OS half the diameter. the formula for area of a circle is pi x r squared. pi is 3.141593
If a circle has a radius of 8 cm long how long is the circle's diameter?
16cm
If you divide a radius of a circle by 2 what will happen to the area?
If the radius of a circle becomes 1/2 as long, the area becomes 1/4 as much.
If an area in the form of a circle is to be roped off by a rope 10 m long what will be the radius of this area?
The radius of the area will be 1.59 m
What is the area of a circle if it has a diameter which is 18 feet long?
The area of a circle is equal to πr2 where π (pi) is equal to approximately 3.142 and r represents the radius of the circle. Because the question gives you the diameter and not the radius you have to use the measurement of the diameter to calculate the radius. Remember that the radius is equal to half the diameter. So if the diameter is equal to 18 feet, then the radius of this particular circle is equal to 9 feet. Plugging this into our equation for area we get: area = π(92) area = 3.142(81) area = about 254.5 ft2 (don't forget that the answer is in squared feet not just feet)
How do you find the circumference of a circle without knowing the radius and area?
You will have to measure some part of the circle. As long as you have absolutely no information about a circle, you can't do any calculations.
What is the area of a circle if the diameter is 16' long?
The area of a circle is worked out using the formula: area = Pi x (radius x radius) (a.k.a Pi r2 <- sorry, no Pi symbol available. ) The diameter is always twice the radius (the radius is the distance from the edge of the circle to the centre, the diameter is the distance from one edge to the other, through the centre). So, if your circle has a diameter of 16 feet, the radius will be 8 feet. Area = Pi x 82. = Pi x 64. Pi = 3.14159 So... Area = 3.14159 x 64 = 201.1 feet2.
What is the length of this radius of the circle?
To find the radius you should either know the area or the circumference. The area is found by multiplying the radius squared by pi which is 3.14159 The equation is ... A=pi x r2 The area is the total amount of space inside the circle The circumference is found by multiplying 2 and pi and radius together. The equation is ... C=2 x pi x r The circumference is the total amount of length around the outside of the circle. So with this information you should be able to find the length of the radius. If your not sure what the radius is. The radius is the length from the center of the circle to one of the points on the outer side of the circle. The radius is the same distance to any point on the outer side of the circle as long as the radius starts in the middle point of the circle.
Find the area of a circle with a diameter of 5 inches long?
pi x 2.5 squared because 2.5 is the radius. the radius OS half the diameter. the formula for area of a circle is pi x r squared. pi is 3.141593
If a circle has a radius of 8 cm long how long is the circle's diameter?
16cm
How do you find the area of a circle given the radius of a circle?
Find the circumference of a circle with radius 5 ft.Area of a circle. The area of a circle of radius r is given by the polynomial πr2. Use 3.14 as an approximation for π.
If the diameter of a circle is 12 inches how long is the radius?
Diameter of a circle is defined as twice the radius. So if diameter is 12, the radius is 6.
An arc 14cm long on the circumference of a circle subtends an angle of 128degrees.What is the radius of the circle?
The radius is: 6.267 cm
Is the diameter of a circle 2 x radius?
Yes. The radius is from the centre to the edge of the circle. Therefore, 2xr is twice as long and is the diameter of the circle.
