Find the area of each component shape and add them together.<br><br>&bull; Semicircle: diameter = 28 cm, radius = 14 cm. Area = \( \dfrac{1}{2} \times \pi \times 14^2 = \dfrac{1}{2} \times \dfrac{22}{7} \times 196 = 308 \) cm&sup2;.<br>&bull; Rectangle: 21 cm &times; 8 cm = 168 cm&sup2;.<br>&bull; Triangle: base = 7 cm, height = 8 cm. Area = \( \dfrac{1}{2} \times 7 \times 8 = 28 \) cm&sup2;.<br>&bull; Total area = 308 + 168 + 28 = 504 cm&sup2;.<br><br>Final Answer: 504 cm&sup2;