Given: Length of the rectangle = 15 cm Breadth of the rectangle = 10 cm Formula: Area of the rectangle = length × breadth Area of the base = (1 / 2) × Base × Height Calculation: Height of the triangle = 15 cm Base of the triangle = 10 cm Area of the rectangle =15×10=150cm2 Area of triangle =(1/2)×15×10=75cm2 ∴ Remaining Area =150−75=75cm2