Answer:
So, the area of the circle is 78.5 square units, and the circumference is 31.4 units.
To find the area and circumference of a circle, we need to know the radius or diameter of the circle. The radius is the distance from the center of the circle to any point on the circle, while the diameter is the distance across the circle passing through the center.
To find the area of the circle, we use the formula A = πr^2, where π is a mathematical constant approximately equal to 3.14, and r is the radius of the circle. So, if you have the radius, you can substitute it into the formula to find the area.
To find the circumference of the circle, we use the formula C = 2πr, where C represents the circumference and r represents the radius of the circle. Again, we use the value of π as approximately 3.14. If you have the radius, you can substitute it into the formula to find the circumference.
If you have the diameter instead of the radius, you can find the radius by dividing the diameter by 2. Then, you can use the formulas mentioned above to find the area and circumference.
Let's say we have a circle with a radius of 5 units.
To find the area, we substitute the radius into the formula A = πr^2:
A = 3.14 * 5^2 = 3.14 * 25 = 78.5 square units.
To find the circumference, we substitute the radius into the formula C = 2πr:
C = 2 * 3.14 * 5 = 31.4 units.
So, the area of the circle is 78.5 square units, and the circumference is 31.4 units.
Remember, if you have a different radius or diameter, you can use the same formulas to find the area and circumference. Just substitute the appropriate value into the formulas.
Step-by-step explanation: