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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

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WARM UP REVIEW: 6.3 WORKSHEET PROBLEMS FROM HW#4

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

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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.

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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.

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

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

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

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

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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

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