Republic of the Philippines Department of Education Kapatagan National HS Region XI Lesson Plan in Mathematics (4 A’s) Grade 7 Week 5 Lesson 2: 3rd Quarter I. OBJECTIVES At the end of 60-minute period with 80% proficiency level, the students are expected to: 1. define, identify and illustrate different kinds of polygons according to the number of sides; 2. differentiate convex from non – convex (concave) polygons; and 3. identify the parts of a polygon. II. SUBJECT MATTER Topic: POLYGONS References: Geometry: Polygons: Different Kinds of Polygons | SparkNotes. (n.d.). Retrieved July 31, 2021, from https://www.sparknotes.com/math/g eometry1/polygons/section2/ Classifying Polygons. (n.d.). Retrieved July 31, 2021, from https://www.cliffsnotes.com/studyguides/geometry/polygons/classifyingpolygons Instructional Materials: PowerPoint Presentation, Laptop, Smart TV, Chalk, Eraser. III. LEARNING PROCEDURE A. Preliminary Activities a. b. c. d. e. Prayer! Greetings! Checking of the Attendance Setting of Classroom Standards Checking and collecting of assignments (if there’s any B. Review C. Motivation D. Activity E. Analysis Ask the students about the previous lesson. What they learn in previous lesson. The teacher gives the game entitled “Guess the Word” related to the topic. IDENTFY ME: Whether Equilateral, Equiangular, Regular Polygon. After the activity students will be asked by the following; What have you observed? How did you identify the figures? It is easy to identify those figure? F. Abstraction REGULAR POLYGON A polygon is equilateral if all sides have equal length. A polygon is equiangular if all angles have equal measure. A regular polygon is both equilateral and equiangular. Some regular polygons have special names: A four – sided regular polygons – SQUARE. A three – sided regular polygon – EQUILATERAL TRIANGLE. PARTS OF POLYGONS In naming a polygon, start with any vertex in consecutive order either clockwise or counterclockwise. Let us familiarize the terms below: Consecutive Vertices -vertices of a polygon that include the endpoints of the same side. Consecutive Sides- are two sides of a polygon which share a common angle. Consecutive Angles- angles in a polygon that share a segment as one of the sides that could be extended into a ray. Diagonal- a segment joining two nonconsecutive vertices of the polygon. Vertex Angle- an angle formed by two consecutive sides. Also called interior angle. Central Angle- an angle formed by the segments joining consecutive vertices to the center of a regular polygon. Exterior Angle- an angle formed by a side and an extension of an adjacent side. G. Application IV. EVALUATION V. ASSIGNMENT Teacher instructs the students to study the next lesson. Prepared by: Checked & Reviewed by: MS. MARY SHANE A. VILLASOR Pre-service Teacher MRS. JAVENLY M. ROMERO Cooperating Teacher