Congruence Unit 8, Lesson 1 Geometry. Vocabulary If two geometric figures have exactly the same shape and size, they are congruent. www.marianhs.org/userfiles/1059/.../4-3%20Congruent%20Triangles.ppt.

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Presentation transcript:

Congruence Unit 8, Lesson 1 Geometry

Vocabulary If two geometric figures have exactly the same shape and size, they are congruent.

Examples: CongruentNot congruent A B C D E F

Vocabulary In two congruent polygons, all of the parts of one polygon are congruent to the corresponding parts or matching parts of the other polygon. These corresponding parts include corresponding angles and corresponding sides.

Corresponding sides and angles Corresponding AnglesCorresponding sides AB C R S T AB RS BC ST AC RT

Naming Congruent Parts Δ TJD = Δ RCF. List the corresponding parts: T J D R C F Corresponding Angles: <T = <J = <D = Corresponding Sides: TJ = JD = TD = yourcharlotteschools.net/...site/4.1a.ppt

A B C H J K

Write a congruence statement for the congruent polygons shown. One Possible Answer: ABCDE  RTPSQ.

Finding Congruent Triangles Decide whether the triangles are congruent. Justify your answer A B C D E yourcharlotteschools.net/...site/4.1a.ppt

In the diagram, ΔITP  ΔNGO. Find the values of x and y.

ABCDE  PQRST