Question

what two measurements are required to find triangle area?
perimeter and side
base and height
radius and diameter
length and width

Explanation:

The formula for the area of a triangle is $\frac{1}{2} \times \text{base} \times \text{height}$, so these two measurements are required. Other options refer to measurements for shapes like circles (radius/diameter), rectangles (length/width), or do not relate to triangle area calculation.

Answer:

Base and height