Our radius is equal to two so the area if were talking about the whole circle it would be equal to pi times two squared. Well they tell us what our radius is. Area of a Semi-Circle Formula.
Therefore Area of a semicircle pr 22.
314 Finally you divide that answer by two. Therefore the formula to calculate area of a semicircle is given by. Area semicircle Area circle 2 pr² 2. Area equals pi time the radius squared then divided by two.