Precalculus Flashcards: All Circles Are Similar

Study All Circles Are Similar in Precalculus with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.

QUESTION

Use the Law of Cosines: find $c$ if $a=5$ , $b=5$ , and included angle $C=60^\circ$ .

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ANSWER

$c=\sqrt{5^2+5^2-2\cdot^5\cdot^5\cos 60^\circ}=5$ . Isosceles with $60°$ angle forms equilateral triangle.

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What this deck covers

This deck focuses on All Circles Are Similar, giving you a quick way to review the definitions, rules, and examples that matter most for Precalculus.

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 3Practice questions for this set

A surveyor measures triangle sides

a = 80\text{ m}

b = 65\text{ m}

, and

c = 50\text{ m}

(opposite angles

A

B

, and

C

respectively). Using the measurements, which law should be applied first to find an angle of the triangle?

Choose an answer

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