Triangle Area Calculator
Compute the area of a triangle from its base and perpendicular height.
Limitations: Requires the PERPENDICULAR height, not a slanted side. Given three sides (a, b, c), use Heron's formula instead — this tool doesn't cover that case. Does not compute angles or other triangle properties.
What to do next: Base and height must be in the same unit. A roof gable 12 ft wide by 9 ft high = 54 ft².