How do you find the measure of a missing angle in a triangle?

In a triangle, the sum of the interior angles is always $$180\text{°}$$ . Subtract the known angles from $$180\text{°}$$ to find the missing angle.

If one angle is $$x$$ , what is the measure of its complementary angle?

The measure of its complementary angle is $$90\text{°} - x$$ .

If one angle is $$y$$ , what is the measure of its supplementary angle?

The measure of its supplementary angle is $$180\text{°} - y$$ .

What is the relationship between angles in a linear pair?

Angles in a linear pair are supplementary, meaning they add up to $$180\text{°}$$ .

What is the measure of an angle that is complementary to a $$47\text{°}$$ angle?

The measure of the angle is $$90\text{°} - 47\text{°} = 43\text{°}$$ .

What is the measure of an angle that is supplementary to a $$122\text{°}$$ angle?

The measure of the angle is $$180\text{°} - 122\text{°} = 58\text{°}$$ .

What is the sum of the angles in a quadrilateral?

The sum of the angles in a quadrilateral is always $$360\text{°}$$ .

If two angles are equal and supplementary, what is the measure of each angle?

Each angle measures $$90\text{°}$$ .

Types of Angles Flashcards

Student preview

15 questions

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1.

FLASHCARD QUESTION

Front

What is an angle?

Back

An angle is formed by two rays (sides of the angle) that share a common endpoint (the vertex).

2.

FLASHCARD QUESTION

Front

What are complementary angles?

Back

3.

FLASHCARD QUESTION

Front

What are supplementary angles?

Back

4.

FLASHCARD QUESTION

Front

What is a right angle?

Back

5.

FLASHCARD QUESTION

Front

What is an acute angle?

Back

6.

FLASHCARD QUESTION

Front

What is an obtuse angle?

Back

7.

FLASHCARD QUESTION

Front

What is a straight angle?

Back

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