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Congruent Figures Section 4-1

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Solve each equation. 1.x + 6 = 252.x + 7 + 13 = 33 3.5x = 5404.x + 10 = 2x 5.For the triangle at the right, use the Triangle Angle-Sum Theorem to find the value of y.

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Congruent figures have the same ______________ and _______________. When two figures are congruent, you can move one so that it fits exactly on the other one.

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Three ways to make such a move are a _____________, a _____________, or a ________________.

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Discovery Learning: 1.Draw a shape on your paper. 2.Cut it out. Trace the original shape on the paper again. 3.Flip/slide/rotate the shape and trace it. 4.Draw both the original shape and the “new” shape on the board. 5.As a class, figure out how each shape was flipped/slid/rotated.

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________________ have congruent corresponding parts -matching ___________ and ___________. When you name congruent polygons, always list corresponding vertices in the same order.

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Write a statement of triangle congruence. B C D A F D H ZP R

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Pg 183 #16-25 together

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In Exercises 1 and 2, quadrilateral WASH quadrilateral NOTE. 1.List the congruent corresponding parts. 2.m O = m T = 90 and m H = 36. Find m N. 3.Write a statement of triangle congruence. 4.Write a statement of triangle congruence. 5.Explain your reasoning in Exercise 4 above.

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Homework: Pg 183 #3 - 14, 29

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Unit 1 Transformations Day 5. Similar Polygons - Two figures that have the same shape but not necessarily the same size ◦ Symbol: ~ ◦ Similar Polygons.

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