Area of a triangle = \( \frac{1}{2} \times \text{base} \times \text{height} \).<br><br>For each shaded triangle, identify its base and perpendicular height from the grid, then apply the formula.<br><br>Triangle A: base = 3 cm, height = 2 cm &rarr; \( \frac{1}{2} \times 3 \times 2 = 3 \) cm&sup2;<br>Triangle B: base = 4 cm, height = 2 cm &rarr; \( \frac{1}{2} \times 4 \times 2 = 4 \) cm&sup2;<br>Triangle C: base = 4 cm, height = 3 cm &rarr; \( \frac{1}{2} \times 4 \times 3 = 6 \) cm&sup2;<br><br>Final Answer: A = 3 cm&sup2;, B = 4 cm&sup2;, C = 6 cm&sup2;