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What is the formula for area of a half circle but you don't have the radius?
If you have the diameter, then the formula for the area of a semi-circle is:(pi x (diameter/2)2)/2That is,Divide the diameter in two to find the radius (diameter/2)Square the radius (radius x radius)Multiply it by pi (3.1416)Divide the answer by two to find half the circle.Remember your units. The answer will be in square inches, or square centimeters or square somethings.
How do you find the radius of a square mile?
Well the formula for the radius of the square is radius squared * pi (3.14)So find the radius (which is half of the diameter. which is exactly half of the shape)and do the formula. end the answer with "m".
What is half of a diameter of a circle called?
The radius of the circle.
Find the radius of a circle which has a diameter of 3.6cm?
The radius of a circle is the distance from the center to an outside edge of the circle. The diameter is the distance all the way across the circle. Therefore, the radius is half the value of the diameter.
How do you calculate the radius of a circle?
The radius of a circle is half of its diameter.
How do you find the bottom half of a circle?
To find the area of half a circle, use the formula for a circle pi*r^2 divided by 2. pi = 3.14, r = radius (half the distance across the circle)
How do you find the radius in a circle?
The radius of a circle is half the diameter or half the circumference divided by pi (3.1416).
What is the formula for radius?
A radius is half of the diameter of a circle, or the distance from one endpoint to the center.
How do you find the radius of a circle from the diameter?
the radius is half the diameter
How do you find the circumference of a circle when you know the area?
To find the circumference of a circle when you know the area, you first need to find the radius of the circle using the formula for the area (area = πr^2). Once you have the radius, you can calculate the circumference using the formula for the circumference (circumference = 2πr).
How do you find the area using the diameter?
I assume that you are referring to the area of a circle. You divide the diameter in half to find the radius and then you put it into the formula.
How do you find the center of a circle if you know the radius?
the radius is half of the diameter. and the middle of the circle is half way between this diameter.
What is the formula for area of a half circle but you don't have the radius?
If you have the diameter, then the formula for the area of a semi-circle is:(pi x (diameter/2)2)/2That is,Divide the diameter in two to find the radius (diameter/2)Square the radius (radius x radius)Multiply it by pi (3.1416)Divide the answer by two to find half the circle.Remember your units. The answer will be in square inches, or square centimeters or square somethings.
What is the formula for the area of a circle with a diameter?
The general formula for the area of a circle is pi times the radius squared. The radius is half the diameter, so the area is pi times half the diameter times half the diameter again.
How do you find the radius of a circle when you have the diameter?
Half it.
In the formula for the area of a circle what gets multiplied by 3.14?
The radius squared. The radius is half of the diameter
How are radius and diameter alike and different?
Alike: Their in the formula to find the area of the circle pie times radius squared or pie times diameter divided by 2 Different: In a circle, radius is half of the diameter. Example: If the diameter of a circle is 10. Then the radius would be 5.
