This lesson plan is for a 9th standard class on Rhombus. It includes the name of the teacher, school, subject, unit, topic, and date. The key concepts to be covered are the definition of Rhombus, its peculiarities, the formula for calculating its diagonals, and applying the concept in other situations. Pre-requisites include knowledge of quadrilaterals and geometry terms. Teaching methods include charts, textbooks, and connecting concepts to information technology. Learning outcomes are for students to recall, describe, explain, and apply Rhombus concepts and judge their appropriateness in problems.