Find the surface area of the cone. Use 3.14 for π
This is a cone with a:
Radius 8in
Slant Height 9in
base 7in
To find the surface area of a cone, we need to add the area of the base to the lateral surface area.
First, let's find the area of the base of the cone. The formula to find the area of a circle is A = πr^2, where A is the area and r is the radius.
So, the area of the base is A = 3.14 * (8in)^2 = 3.14 * 64in^2 = 200.96in^2.
Next, let's find the lateral surface area of the cone. The formula to find the lateral surface area of a cone is A = πrs, where A is the lateral surface area, r is the radius, and s is the slant height.
So, the lateral surface area is A = 3.14 * 8in * 9in = 226.08in^2.
Finally, let's find the total surface area by adding the base area and the lateral surface area. The total surface area is 200.96in^2 + 226.08in^2 = 427.04in^2.
Therefore, the surface area of the cone is 427.04in^2.