# Pre-Algebra Examples

, ,

Step 1

Use the formula to find the area of the triangle with points , , .

Step 2

Step 2.1

Substitute the values of the first point into the formula.

Step 2.2

Substitute the values of the second point into the formula.

Step 2.3

Substitute the values of the final point into the formula.

Step 3

Step 3.1

Add and .

Step 3.2

Multiply by .

Step 3.3

Subtract from .

Step 3.4

Multiply by .

Step 3.5

Multiply by .

Step 3.6

Subtract from .

Step 3.7

Multiply by .

Step 3.8

Subtract from .

Step 3.9

Add and .

Step 3.10

The absolute value is the distance between a number and zero. The distance between and is .