Given:
Given that the radius of the semicircle is 4 units.
We need to determine the area of the semicircle.
Area of the semicircle:
The area of the semicircle can be determined using the formula,

Substituting π = 3.14 and r = 4, we get;

Simplifying, we get;

Multiplying, we get;

Dividing, we get;

Thus, the area of the semicircle is 25.12 square units.