LESSON PLAN
oleh: Lestariningsih
SECOND MEETING
SCHOOL : Junior High School
SUBJECT : Mathematics
CLASS / SEMESTER : VIII/2
TIME ALLOCATION : 2 x 40 minutes
A. Standard Competence
5. Understanding the properties of cube, cuboids, prism, pyramid, their elements and their size
B. Basic Competence
5.1. Identifying the properties of cube, cuboids, prism, pyramid, their element
C. Learning Objectives
 Students can identify the face of cube.
 Students can identify the edge of cube
 Students can identify the vertex of cube
 Students can identify the face of cuboids
 Students can identify the edge of cuboids
 Students can identify the vertex of cuboids
 Students can identify the face of prism
 Students can identify the edge of prism
 Students can identify the vertex of prism
 Students can identify the face of pyramid
 Students can identify the edge of pyramid
 Students can identify the vertex of pyramid
 Students can determine the Euler formula in solid figure
D. Learning Materials
Face, edge and vertex of cube
Face, edge and vertex of cuboids
Face, edge and vertex of prism
Face, edge and vertex of pyramid
E. Learning Model
Cooperative
Learning Method
Discussion
Demonstration
Giving Task
Question & Answer
Approach
Pendidikan Matematika Realistik Indonesia (PMRI)
 F. Learning Activity
Opening (15 minutes)
 Teacher says greeting and makes sure that the students are ready to study.
 Students are reminded about cube and cuboids net.
 Teacher tells the objectives of learning. Those are students able to identify the face, edge and vertex of cube and cuboids.
Main Activity (45 minutes)
 a. Exploration (15 minutes)
 Students are divided to be some groups and each group consists of 2 students.
 Each group is given worksheet.
 Students identify each figure in worksheet and classify into kinds of solid figure.
 Students count the number of face of cube
 Students count the number of edge of cube
 Students count the number of vertex of cube
 Students count the number of face of cuboids
 Students count the number of edge of cuboids
 Students count the number of vertex of cuboids
 Students count the number of face of prism
 Students count the number of edge of prism
 Students count the number of vertex of prism
 Students count the number of face of pyramid
 Students count the number of edge of pyramid
 Students count the number of vertex of pyramid
 b. Elaboration (20 minutes)
 Students discus their work in front of classroom.
 Other groups give their responses to the discussion.
 Students look for the relationship between face, shape, and vertex of solid figure
 b. Elaboration (20 minutes)
 c. Confirmation (10 minutes)
 Students determine the Euler’s formula.
 Teacher guides students to determine which one is true.
Closing (20 minutes)
 Students make conclusion from their learning process that is
The Vertices + Faces is always two more than Edges. You can write this down as a formula:
V – E + F = 2
 Students do exercises individually.
G. Learning Sources
 Mathematicsfor junior high schoolyear 8. Department of National Education 2010
 Math for Junior High School 2^{nd} semester grade 8, Erlangga
 Worksheet
 Snack box
Palembang, March 31, 2011
Teacher team,



Principle
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