What is the definition of a right triangle?

A triangle with one angle measuring 90 degrees.

How do you find the missing angle in a triangle?

Subtract the sum of the known angles from 180 degrees.

What is the relationship between sine, cosine, and tangent?

$$\tan\theta = \frac{\sin\theta}{\cos\theta}$$ .

What is the definition of an angle in standard position?

An angle whose vertex is at the origin and whose initial side lies along the positive x-axis.

9.25 Trigonometry Day 2: FLASHCARDS: optional Practice Flashcards

Student preview

16 questions

Show all answers

1.

FLASHCARD QUESTION

Front

What do the angles in a triangle sum to?

Back

180 degrees.

2.

FLASHCARD QUESTION

Front

What is the formula for tangent in a right triangle?

Back

$\tan\theta = \frac{opposite}{adjacent}$ .

3.

FLASHCARD QUESTION

Front

If two angles in a triangle are 64° and 90°, what is the measure of the third angle?

Back

26°.

4.

FLASHCARD QUESTION

Front

What is the sine ratio used to find side AB in a right triangle where Sin 60 = AB / 10?

Back

Sin 60 = AB / 10.

5.

FLASHCARD QUESTION

Front

What is the cosine ratio in a right triangle?

Back

$\cos\theta = \frac{adjacent}{hypotenuse}$ .

6.

FLASHCARD QUESTION

Front

What is the sum of the interior angles of a triangle?

Back

180 degrees.

7.

FLASHCARD QUESTION

Front

What is the relationship between the sides and angles in a right triangle?

Back

The side opposite the largest angle is the longest.

8.

FLASHCARD QUESTION

Front

What is the formula for finding the hypotenuse in a right triangle?

Back

$c = \sqrt{a^2 + b^2}$ , where c is the hypotenuse.

10.

FLASHCARD QUESTION

Front

What is the Pythagorean theorem?

Back

$a^2 + b^2 = c^2$ , where c is the hypotenuse.

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