Download Geometry Fall 2011 Lesson 17 (S.A.S. Postulate)

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Lesson Plan #019
Date: Tuesday October 25th, 2016
Class: Geometry
Topic: Proving triangles congruent by the A.S.A postulate
Aim: How do we prove triangles congruent by the A.S.A postulate?
HW #019:
Objectives:
1) Students will be able prove triangles congruent using the A.S.A. postulate
Do Now:
Statements
Assignment #1: Construct two triangles by constructing a copy of
the line segment below and constructing a copy of one angle on
one endpoint of the line segment and a copy of the other angle at
the other endpoint.
PROCEDURE:
Write the Aim and Do Now
Get students working!
Take attendance
Give Back HW
Collect HW
Go over the Do Now
Reasons
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Let’s explore pairs of triangles that have two corresponding angles congruent and the
included side congruent.
Online Activity:
http://www.mathopenref.com/congruentasa.html
Postulate:
Two triangles are congruent if two angles and the included side of one triangle are congruent respectively to two angles and
the included side of the other [a.s.a. a.s.a]
Statements
Reasons
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Sample Test Questions:
1) Based on the figure at right, how would you prove the two triangles congruent?
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Final Summary:
http://www.virtualnerd.com/tutorials/?id=Geo_04_02_0002
Sample Test Questions:
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