Sirrahandayago Sirrahandayago Math Answered ACTIVITY 3 : Find the formula 1. Circle 2. Square and Rectangle 3. Trapezium 4. Triangle 5. Rhombus and Parallelogram A. A = 0.5 x b x h AB. A = b x hC. A = A (3.14 x d x d)d. A=0.5 (b + a) x he. A=I x w