find the area of a circle. use the fraction 22/7 for pi. the diameter is 28 cm:) please help i’m very confused
You're very welcome.
A = pi * r^2
A = (22/7) * 14^2
Can you take it from there?
yes thank you so much!
To find the area of a circle using the fraction 22/7 for pi and a given diameter of 28 cm, you would follow these steps:
1. Recall the formula for the area of a circle: A = πr^2, where A represents the area, π is pi, and r is the radius.
2. The diameter is twice the length of the radius of a circle. So, divide the given diameter of 28 cm by 2 to find the radius.
Radius (r) = Diameter (d) / 2 = 28 cm / 2 = 14 cm.
3. Now that you know the radius is 14 cm, you can substitute this value into the formula.
A = (22/7) × (14 cm)^2
4. Calculate the area using the given fraction for pi and the radius value.
A = (22/7) × (196 cm^2)
A = (22 × 196) / 7 cm^2
A = 4312 / 7 cm^2
5. Simplify the fraction, if possible. In this case, the fraction cannot be simplified.
Therefore, the final answer for the area of the circle is 4312/7 cm^2.