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Unit: Triangles and congruence

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About this unit

Learn what it means for two figures to be congruent, and how to determine whether two figures are congruent or not. Use this immensely important concept to prove various geometric theorems about triangles and parallelograms.

Transformations & congruence

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Getting ready for congruence
(Opens a modal)
Congruent shapes & transformations
(Opens a modal)
Non-congruent shapes & transformations
(Opens a modal)
Segment congruence equivalent to having same length
(Opens a modal)
Angle congruence equivalent to having same measure
(Opens a modal)

Practice

Congruence & transformationsGet 3 of 4 questions to level up!

Triangle congruence from transformations

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Proving the SSS triangle congruence criterion using transformations
(Opens a modal)
Proving the SAS triangle congruence criterion using transformations
(Opens a modal)
Proving the ASA and AAS triangle congruence criteria using transformations
(Opens a modal)
Why SSA isn't a congruence postulate/criterion
(Opens a modal)

Practice

Justify triangle congruenceGet 3 of 4 questions to level up!

Congruent triangles

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Triangle congruence postulates/criteria
(Opens a modal)
Determining congruent triangles
(Opens a modal)
Calculating angle measures to verify congruence
(Opens a modal)
Corresponding parts of congruent triangles are congruent
(Opens a modal)
Proving triangle congruence
(Opens a modal)
Triangle congruence review
(Opens a modal)

Practice

Determine congruent trianglesGet 5 of 7 questions to level up!
Prove triangle congruenceGet 3 of 4 questions to level up!

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Unit: Triangles and congruence

Unit: Triangles and congruence

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About this unit

Transformations & congruence

Learn

Practice

Triangle congruence from transformations

Learn

Practice

Congruent triangles

Learn

Practice

Unit test

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