Surface Area of Cylinders, Cones and Spheres

Front

What is the formula for the surface area of a cylinder?

Back

SA = πr² + πdh, where r is the radius and h is the height.

Front

What is the formula for the surface area of a sphere?

Back

SA = 4πr², where r is the radius.

Front

What is the formula for the surface area of a cone?

Back

SA = πr² + πrl, where r is the radius and l is the slant height.

Front

How do you calculate the surface area of a hemisphere?

Back

SA = 3πr², which includes the curved surface area and the base area.

Front

What is the value of π commonly approximated as?

Back

π is commonly approximated as 3.14.

Front

What is the total surface area of a cylinder composed of?

Back

The total surface area of a cylinder is composed of the area of the two circular bases and the lateral surface area.

Front

How do you find the lateral surface area of a cylinder?

Back

The lateral surface area of a cylinder is found using the formula: Lateral SA = 2πrh.

Front

What is the relationship between the radius and diameter of a circle?

Back

The diameter is twice the radius (d = 2r).

Front

What units are used to measure surface area?

Back

Surface area is measured in square units, such as square inches (sq in), square centimeters (cm²), etc.

Front

How do you round a number to the nearest hundredth?

Back

To round to the nearest hundredth, look at the third decimal place; if it's 5 or more, round up the second decimal place.