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ACT Math Flashcards: Similarity And Congruence

Study Similarity And Congruence in ACT Math with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.

QUESTION

What is the hypotenuse-leg (HL) congruence theorem?

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ANSWER

Right triangles are congruent if hypotenuse and one leg are equal. Special case for right triangles only.

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ACT Math: Preparing for Higher Math

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What this deck covers

This deck focuses on Similarity And Congruence, giving you a quick way to review the definitions, rules, and examples that matter most for ACT Math.

How to use these flashcards

Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Practice questions

1 of 50Practice questions for this set
Two triangles are shown with markings indicating equal parts. In △ABC\triangle ABC and △DEF\triangle DEF, ∠A\angle A is marked congruent to ∠D\angle D (one arc), and ∠B\angle B is marked congruent to ∠E\angle E (two arcs). The side between those angles, ABAB, has one tick mark, and the corresponding side DEDE also has one tick mark. Which congruence criterion applies (SSS, SAS, ASA, AAS)?
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