1. Today – Wednesday, February 6, 2013  Review 6.3 Worksheet Problems  Learning Target 1: Use Angle-Angle Similarity Theorem to prove two triangles are congruent  Learning Target 2: Use proportions with triangles or parallel lines  Independent practice/ Collect 6.4 HW

2. WARM UP REVIEW: 6.3 WORKSHEET PROBLEMS FROM HW#4

3. ANGLE/ANGLE SIMILARITY POSTULATE: If two angles of one triangle are congruent to two angles of another triangle, then the two triangles are similar.

4. PRACTICE: Determine whether the triangles are similar. If they are, write a similarty statement. Explain your reasoning. Are the triangles similar? YES. Explanation: -Using the triangle sum theorem, we can find the other angles of the triangles. -We find that two angles in both triangle are congruent, so both triangles are similar.

5. TRIANGLE PROPORTIONALITY THEOREM: If a line parallel to one side of a triangle intersects the other two sides, then it divides the two sides proportionally.

6. CONVERSE OF THE TRIANGLE PROPORTIONALITY THEOREM: If a line divides two sides of a triangle proportionally, then it is parallel to the third side.

7. Write a proportion using Triangle Proportionality Theorem Substitute known values Cross Multiply

8. Write a proportion using Triangle Proportionality Theorem Substitute known values Cross Multiply

9. You will have the rest of class to complete your assignments. You must submit at least one completed assignment TODAY before you leave.

10. HOMEWORK #5: Pg. 384:3-14 Pg. 400: 5-11, 16-17 If finished, work on other assignments: HW #1: Pg. 360: 20-52 even HW #2: Pg. 367: 3-12, 16-18 HW #3: Pg. 379: 40-48 HW #4: Pg. 376: 3-12, 33 Practice 6.3 Worksheet