Area of a Triangle with Base 12 and Height 9
A triangle with base 12 and height 9 has an area of 54 square units.
How to use this tool
- Enter base and height in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your area and the full breakdown beneath it.
Area = ½ × 12 × 9 = 54 square units.
Frequently asked questions
- How do you calculate the area of a triangle?
- Area = (base × height) / 2. The height must be perpendicular to the base.