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ACT Math Flashcards: Triangles

Study Triangles 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 definition of a right triangle in terms of angles?

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ANSWER

One angle is 90∘90^\circ. A right angle defines a right triangle.

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ACT Math: Preparing for Higher Math

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What this deck covers

This deck focuses on Triangles, 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
In △XYZ\triangle XYZ, the measure of ∠X\angle X is 40°40° and the measure of ∠Y\angle Y is 70°70°. What is the measure of ∠Z\angle Z?
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