I have to estimate the area of a circle and use 22/7. The diameter of the circle is 28 cm.
To estimate the area of a circle, you can use the formula A = πr², where A is the area and r is the radius of the circle.
First, let's find the radius of the circle. The diameter of the circle is given as 28 cm. Since the diameter is twice the length of the radius, we can divide the diameter by 2 to find the radius:
radius = diameter / 2
radius = 28 cm / 2
radius = 14 cm
Now that we have the radius, we can plug it into the formula for the area:
A = 22/7 * (radius)²
A = 22/7 * (14 cm)²
A = 22/7 * 196 cm²
A ≈ 616 cm²
Therefore, based on the estimation using the value of π as 22/7, the area of the circle with a diameter of 28 cm is approximately 616 cm².
A = pi * r^2
A = 3 * 14^2
A = ?