Which formula can be used to find the area of a triangle?

The area of a triangle is calculated using the formula 1/2 times the base (b) times the height (h). This formula works because the area of a triangle is essentially half the area of a rectangle that has the same base and height. By multiplying the base by the height, you find the area of that rectangle, and then dividing by two gives you the area of the triangle formed within.

In contrast, the other given formulas pertain to different shapes. The formula for lwh is used to calculate the volume of a rectangular prism, πr²h is the formula for the volume of a cylinder, and 4/3πr³ is the volume of a sphere. Thus, the area of a triangle is specifically represented by the formula 1/2 bh, making it the correct choice for this question.