Lesson Plan #20

1 Lesson Plan #20

Class: Geometry

Date: Tuesday November 17th, 2020

Topic: Proving triangles congruent by the S.S.S. postulate. Aim: How do we prove triangles congruent by the S.S.S postulate?

HW #20: Page 4 of this lesson plan

Objectives: 1) Students will be able prove triangles congruent using the S.S.S. postulate.

Do Now: 1)

Statements

Reasons

2)

1.

1.

PROCEDURE: Write the Aim and Do Now Get students working! Take attendance Give Back HW Collect HW Go over the Do Now

Assignment: Copy the sides of ABC to form new DEF

1) Construct a side congruent to . Call it . 2) Use your compass to measure . Using that measurement put your compass point on D and draw a circle. 3) Use your compass to measure . Using that measurement put your compass point on E and draw a circle. 4) Name the intersection of the circles F forming DEF. 5) With your protractor, measure angles A, B, and C and compare to angles D, E, F, respectively.

What do you notice? If all six corresponding parts are congruent, what can we say about the two triangles?

2



Postulate: Two triangles are congruent if the three sides of one triangle are congruent respectively to the three sides of the other triangle [s.s.s.s.s.s.]

3

Sample Test Questions: Circle the letter or number of your answer choice

1)

6)

2)

7) 3)

4) 8)

5) 9)

4

HW# 20 Name ______________________________ Date ________________ Period _________________ 1)

2) 3)

4) 5)

 ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download