Math Lesson Plan #1 (revised)
Topic: Pythagoras’ Theorem
Aim : To apply Pythagoras’Theorem
Materials: scissors, rulers, pencils, and graph paper.
Procedure:
- Review the properties of a right angle triangle (identify the hypotenuse and legs)
- Tell the history of Pythagoras (refer to attachments)
- Introduce the equation (match the algebraic variables to the parts of the triangle)
- Demonstrate the use of squares
- Use the graph paper to illustrate the proof of Pythatgoras’ Theorem.
- Provide two examples using the equation
- The legs of a triangle measure 3 cm and 4 cm respectively. Calculate the hypotenuse.
- The legs of a triangle measure 6 cm and 7 cm respectively. Calculate the hypotenuse.
- Provide two examples for the students to solve for a leg.
- The hypotenuse of a triangle is 11 cm. If one of the legs measured 9 cm, what is the length of the other leg?
- The hypotenuse of a triangle is 13 cm. If one of the legs measured 11 cm, what is the length of the other leg?
Evaluation:
- Have students attempt exercises (from text).
- Have students attempt for homework the following problem:
You locked your keys in the house. The only way into the house was through the window on the second floor. The window is 15 m high. There is a garden on the outside of the house that extends 4 m away from the wall. You have a ladder that is 8m long. Can you determine if the ladder will be long enough to get into the window?