If a triangle has a base of 12 cm and a height of 9 cm, what is its area?

To determine the area of a triangle, the formula used is:

Area = 1/2 × base × height.

In this instance, the base of the triangle is given as 12 cm and the height as 9 cm. Plugging these values into the formula, the calculation is as follows:

Area = 1/2 × 12 cm × 9 cm

Area = 1/2 × 108 cm²

Area = 54 cm².

Thus, the area of the triangle is indeed 54 cm². This aligns with the provided answer, confirming that it is the correct choice. The formula effectively captures the relationship between the triangle's dimensions, illustrating how the base and height contribute to the overall area.