Last class....

Rigid Transformations

There are 3 rigid transformations: Reflection, Rotation, Translation

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After the rigid transformations, the OG shape and Image are the same shape, size, same everything.

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We say the two shapes are CONGRUENT​

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First, Some Vocabulary...

Congruence -In geometry, congruent means identical in shape and size. The figures will have the same side lengths and same angles​

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Let's test your understanding of the word congruent!​

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Properties of Congruent Figures​

Ways to show congruence...

2) Draw tick marks on sides and angles to state congruence!

​1) Look at the sides/angles and see which sides/angles match

Congruent Vertices & Order

This tells us

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Side A̅B̅ ≅ Side ̅E̅F̅

Side AB is congruent to Side EF

Side AB corresponds to Side EF​

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​(Make sure that your corners match. Order of

vertices (corners) matter!)​

Once we determine the triangles are congruent...

We write a congruence statement to say

two shapes are congruent

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Δ​ABC ≅ ∆FEG

​*Triangle ABC is congruent to Triangle FEG*

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(Make sure your vertices (corners) match when writing you​r congruence statement!)

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