Find the area of a triangle if its base is 20 meters and its height is 7 centimeters.

To find the area of a triangle, use the formula:

S = 1/2 * a * h, where S is the area, a is the base, h is the height.

Next, we want the height and base to be in the same unit. To do this, let’s translate 7 centimeters to meters:

7 cm = 0.07 m.

Now we can find the area:

S = 1/2 * 20 * 0.07 = 0.7 (m²).

Answer: 0.7 m².