Warm up 10/09/15 Friday 1.The three angles in a triangle should add up to _______degrees. 2.When two...

Warm up 10/09/15 Friday1. The three angles in a triangle should add up

to _______degrees.

2. When two triangles are congruent, the measurement of the three ______ and the three _______ are congruent.

3. Create triangle ABC and triangle DEF that are congruent with its side measurements and angle measurements. Label its vertices.

Triangle Activity Pre lesson notesEQ: How do you know when two triangles are congruent?

Introduction before the activity:Know what SSS, SAS, SSA, AAS, ASA, AAA, HL is.

Warm up 10/13/15 Tuesday• Draw a pair of triangles for each conditions

SSS ASA AAA SAS

AAS SSA HL Extra space…

Activity 11 part 1: Congruence Transformations and Triangle CongruenceEQ: How do you label and solve the missing sides and angles of congruent triangles?

Sub EQ1: How do you label and name the corresponding vertices, sides, and angles?

Sub EQ2: How do you solve for the missing sides and the angles of the congruent triangles?

Ex1. If AB = 24 and Angle D = 25 degrees, what can you label?Ex2. If Angle C = 50 degrees and angle E = 40 degrees, what can you label?

Sub EQ3: How do you write the congruence criterion, if any, that can be used to show the triangles are congruent?

What’s due?

• Pg. 165 #1-10

Warm up 10/15/15 Thursday1. Given:

Prove:

2. Given: is the segment bisector of ;

Prove:

A B

CDE

FG

H

JSome Word Bank for the Reasons: Given, Definition of ______, Alternate Interior Angles Theorem, Vertical Angles Theorem, Reflexive Property

Essential Question of the day:How do you use two column proofs to

prove that two triangles are congruent?

• You will need to know the 5 congruent triangle criteria.

• SSS, SAS, ASA, AAS, HL

Closing Questions

• What are some properties or theorems that we used besides the 5 congruence criteria?

• What are some common mistakes?• What were the 5 congruence criteria?

• Quiz Tomorrow!– Know your 5 triangle congruence criteria,– Solving for the missing corresponding sides or angles– Two column proof!

What’s due?

• Pg. 166 #12-16• Instead of summary, write down what you

should be careful of when you’re doing your two column proofs (minimum 5 sentences)

Warm Up 10/16/15 Friday• Use two column proofs to prove that the given

two triangles are congruent.