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4.2 Congruence and Triangles

4.2 Congruence and Triangles. Corresponding Parts – matching up sides & angles . G. F. B. C. H. A. D. E. Name the corresponding Sides (Letter order matters) : Name the corresponding Angles :.

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4.2 Congruence and Triangles

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  1. 4.2 Congruence and Triangles

  2. Corresponding Parts – matching up sides & angles G F B C H A D E Name the corresponding Sides (Letter order matters): Name the corresponding Angles:

  3. Congruent Parts – Equal or exactly the same corresponding parts (shown by the same markings)*When all angles and sides are congruent the figures are congruent! G F B C H A D E Given that trapezoid ABCD is congruent to trapezoid EFGH. Label thefollowing; letter order matters! Congruent Sides: Congruent Angles:

  4. Important Property! • If the first two angles are congruent then so are the third!

  5. ARE THESE 2 TRIANGLES CONGRUENT?

  6. Example:Given that the two triangles are congruent, solve for x: 22o (4x+15)o 87o

  7. Ex: ABCD is  to HGFE, find x and y. F E 9cm B (5y-12)o A 91o 86o H G 113o 4x-3cm D C

  8. Letter order matter when writing congruent statements; be sure that corresponding letter match up! D C A B F E or

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