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Congruence

If shapes are identical in shape and size then they are congruent.

Congruent shapes can be mapped onto each other using translations, rotations and reflections.

What makes these triangles congruent?

AB = PQ, BC = QR,

and AC = PR.

A = P, B = Q,

and C = R.

C

A

BP

Q

R

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Congruent triangles

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Congruent triangles

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Bridge structures and congruency

Identify the congruent shapes in these bridge designs.

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Reflection

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Reflection

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Translations on a coordinate grid

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Rotations on a coordinate grid