3.
Area of rectangle + area of triangle
Base * height + (1/2) Base * Height
9 * 13 + (1/2) (11) * (13 - 8) =
9 * 13 + (1/2) (11) (5) =
117 + (1/2) (55) =
117 + 27.5 =
144.5 cm^2
4. Area of parallelogram = Base x Height
240 = Base x 20 divide both sides by 20
12 cm
