A Detailed Lesson Plan in Mathematics Grade 9 I.
OBJECTIVES a. demonstrate their ability to locate the legs, and the hypotenuse on a right triangle. b. Give their own little ways of how to be naturalist. c. solve for the unknown parts of a right triangle using Pythagorean Theorem
II. SUBJECT MATTER A. Topic: Pythagorean Theorem B. Reference: Mathematics for the new Millennium (Maxima J. Acejalado, Lolita B. Bundalian, Olivia N. Buzon) C. Materials: - pictures (triangle) - Calculators - protractor - Over head projector or white board to write important - formulas and examples for the students to understand. D. Value: Naturalist
II.
LEARNING ACTIVITIES
Teacher’s Activities A. Preliminary Activities 1. REVIEW Ok class let’s review our lesson yesterday What is right triangle again, what is it class? give one and draw it on the board Ok Jeck
Pupils’ Activities
Acute triangle (the student draws an example of an acute triangle.
What kind of triangle is this?
Obtuse triangle
Now let us move on to the third types of a triangle. The right triangle Do you have an idea about a right triangle? Have you heard it before? Not yet Ma’am ( POWER POINT PRESENTATION & DISCUSSION ) 2. MOTIVATION Now, let’s have a game called “ARRANGE yourselves” I will divide the class into four groups. Each group will have three representatives. You are going to arrange yourself according to what I am going to say.
Are you ready? Arrange yourselves according to: a. Your height b. The length of your hair c. Birth Month d. Size of your foot After each item, the teacher will emphasize the difference of their sizes and length. The group with the greatest earned points will win.
B. PRESENTATION 1. Find the length of one leg of the figure below.
That is a scalene triangle No sides are equal
a = ? , b = 16 , c = 20 Since one leg is missing we have to , Manipulate/modify the formula in order to find the missing part. So we have that formula a2 = c2 + b2
B. EVALUATION Solve for the unknown parts of the Triangle. Enclose your final answer. 1.) a =? b=3 c = 15
2.)
III.
a=6 b=8 c =?
ASSIGNMENT
Answer your Test yourself in your Math book pages 216 – 218 Nos. 1-4 in your assignment notebook. Enclose your final answer.