# Pre-Algebra Examples

Step 1

The surface area of a cone is equal to the area of the base plus the area of the cone.

Step 2

Substitute the values of the length and height into the formula. Pi is approximately equal to .

Step 3

Move to the left of .

Step 4

Step 4.1

Raise to the power of .

Step 4.2

Raise to the power of .

Step 4.3

Add and .

Step 4.4

Rewrite as .

Step 4.4.1

Factor out of .

Step 4.4.2

Rewrite as .

Step 4.5

Pull terms out from under the radical.

Step 5

Step 5.1

Apply the distributive property.

Step 5.2

Multiply.

Step 5.2.1

Multiply by .

Step 5.2.2

Multiply by .

Step 6

The result can be shown in multiple forms.

Exact Form:

Decimal Form: